STRING_SPLIT in SQL Server 2012

STRING_SPLIT in SQL Server 2012 - sql

I have this parameter
#ID varchar = '1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20'
I want to do something to split the comma-separated values.
The string_split function doesn't work and I get this error:
The STRING_SPLIT function is available only under compatibility level 130
and I try to alter my database and set the compatibility to 130 but I don't have a permission for this change.

Other approach is to use XML Method with CROSS APPLY to split your Comma Separated Data :
SELECT Split.a.value('.', 'NVARCHAR(MAX)') DATA
FROM
(
SELECT CAST('<X>'+REPLACE(#ID, ',', '</X><X>')+'</X>' AS XML) AS String
) AS A
CROSS APPLY String.nodes('/X') AS Split(a);
Result :
DATA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Example :
DECLARE #ID NVARCHAR(300)= '1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20';
DECLARE #Marks NVARCHAR(300)= '0,1,2,5,8,9,4,6,7,3,5,2,7,1,9,4,0,2,5,0';
DECLARE #StudentsMark TABLE
(id NVARCHAR(300),
marks NVARCHAR(300)
);
--insert into #StudentsMark
;WITH CTE
AS (
SELECT Split.a.value('.', 'NVARCHAR(MAX)') id,
ROW_NUMBER() OVER(ORDER BY
(
SELECT NULL
)) RN
FROM
(
SELECT CAST('<X>'+REPLACE(#ID, ',', '</X><X>')+'</X>' AS XML) AS String
) AS A
CROSS APPLY String.nodes('/X') AS Split(a)),
CTE1
AS (
SELECT Split.a.value('.', 'NVARCHAR(MAX)') marks,
ROW_NUMBER() OVER(ORDER BY
(
SELECT NULL
)) RN
FROM
(
SELECT CAST('<X>'+REPLACE(#Marks, ',', '</X><X>')+'</X>' AS XML) AS String
) AS A
CROSS APPLY String.nodes('/X') AS Split(a))
INSERT INTO #StudentsMark
SELECT C.id,
C1.marks
FROM CTE C
LEFT JOIN CTE1 C1 ON C1.RN = C.RN;
SELECT *
FROM #StudentsMark;

Inline function based on Yogesh Sharma and Salman A answers:
Create FUNCTION [dbo].[fn_split_string]
(
#string nvarchar(max),
#delimiter nvarchar(max)
)
/*
The same as STRING_SPLIT for compatibility level < 130
https://learn.microsoft.com/en-us/sql/t-sql/functions/string-split-transact-sql?view=sql-server-ver15
*/
RETURNS TABLE AS RETURN
(
SELECT
--ROW_NUMBER ( ) over(order by (select 0)) AS id -- intuitive, but not correect
Split.a.value('let $n := . return count(../*[. << $n]) + 1', 'int') AS id
, Split.a.value('.', 'NVARCHAR(MAX)') AS value
FROM
(
SELECT CAST('<X>'+REPLACE(#string, #delimiter, '</X><X>')+'</X>' AS XML) AS String
) AS a
CROSS APPLY String.nodes('/X') AS Split(a)
)
Example:
DECLARE #ID NVARCHAR(300)= 'abc,d,e,f,g';
select * from fn_split_string(#ID,',')
-- If you need exactly string_split functionality (without id column):
select value from fn_split_string(#ID,',')

Another approach would be to use CHARINDEX and SUBSTRING in a WHILE:
DECLARE #IDs VARCHAR(500);
DECLARE #Number VARCHAR(500);
DECLARE #charSpliter CHAR;
SET #charSpliter = ',';
SET #IDs = '1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20' + #charSpliter;
WHILE CHARINDEX(#charSpliter, #IDs) > 0
BEGIN
SET #Number = SUBSTRING(#IDs, 0, CHARINDEX(#charSpliter, #IDs));
SET #IDs = SUBSTRING(#IDs, CHARINDEX(#charSpliter, #IDs) + 1, LEN(#IDs));
PRINT #Number;
END;

Alternate function to String_Split for older versions of SQL Server
Create this Function in your Database
Create Function dbo.Test_Split( #string varchar(4000))
Returns
#Result Table (value varchar(100))
As
Begin
declare #len int, #loc int = 1
While #loc <= len(#string)
Begin
Set #len = CHARINDEX(',', #string, #loc) - #loc
If #Len < 0 Set #Len = len(#string)
Insert Into #Result Values (SUBSTRING(#string,#loc,#len))
Set #loc = #loc + #len + 1
End
Return
End
How to Use
Select
*
From
dbo.Test_Split('First,Second,Third,Fourth')

For those looking how to transform multi-line text into rows, here is a code based on the answer:
declare #text varchar(max) = 'line0
line1
line2'
select split.a.value('.', 'nvarchar(max)') data
from
(
select cast('<x>' + replace(#text, char(13) + char(10), '</x><x>') + '</x>' as xml) as string
) as a
cross apply string.nodes('/x') as split(a)

Thank you al3x-m.
i create this function for reused in many time.
CREATE FUNCTION STRING_SPLIT_POLYFILL2016 (
#string NVARCHAR(4000)
,#separator NVARCHAR(4000)
)
RETURNS #T TABLE (ColName VARCHAR(4000))
AS
BEGIN
/*
pitt phunsanit
polyfill of STRING_SPLIT in SQL Server 2016
https://learn.microsoft.com/en-us/sql/t-sql/functions/string-split-transact-sql?view=sql-server-ver15
https://stackoverflow.com/questions/46902892/string-split-in-sql-server-2012
*/
DECLARE #Number VARCHAR(4000);
SET #string = #string + #separator;
WHILE CHARINDEX(#separator, #string) > 0
BEGIN
SET #Number = SUBSTRING(#string, 0, CHARINDEX(#separator, #string));
SET #string = SUBSTRING(#string, CHARINDEX(#separator, #string) + 1, LEN(#string));
INSERT INTO #T (ColName)
VALUES (#Number)
END
RETURN
END
-- DEMO
DECLARE #IDS NVARCHAR(4000)
SET #IDS = 'pitt,phunsanit,01,02,03,4,5,6,7,8,9,10,พิชญ์,พันธุ์สนิท'
SELECT *
FROM STRING_SPLIT_POLYFILL2016(#IDS, ',')
Live demo on dbfiddle

A little variation of #Al3x_M's polyfill, when it is not possible to change the database compatibility level : I use a TABLE variable to store the list of value, for using them later in another query:
DECLARE #IDs VARCHAR(500);
SET #IDs = '1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,2a0' ;
declare #list TABLE (id int);
DECLARE #Number int, #idx int
DECLARE #charSpliter CHAR;
SET #charSpliter = ','
SET #IDs = #IDs + #charSpliter;
set #idx = 0
WHILE (1 = 1)
BEGIN
set #idx = CHARINDEX(#charSpliter, #IDs)
if (#idx is NULL or #idx <= 0) break;
BEGIN TRY
SET #Number = SUBSTRING(#IDs, 0, #idx)
SET #IDs = SUBSTRING(#IDs, #idx + 1, LEN(#IDs))
insert #list select convert(int, #Number)
END TRY
BEGIN CATCH
break
END CATCH
END
-- #list available for the next query...
select * from #list

Add a another method to split string. It is faster I used. especially to split log string. more information please refer: https://sqlperformance.com/2012/07/t-sql-queries/split-strings
create FUNCTION [dbo].[UFN_STRING_SPLIT]
(
#List NVARCHAR(MAX),
#Delimiter NVARCHAR(255)
)
RETURNS TABLE
WITH SCHEMABINDING
AS
RETURN
(
SELECT Item = y.i.value('(./text())[1]', 'nvarchar(max)')
FROM
(
SELECT x = CONVERT(XML, '<i>'
+ REPLACE(#List, #Delimiter, '</i><i>')
+ '</i>').query('.')
) AS a
CROSS APPLY x.nodes('i') AS y(i)
);
test code:
declare #sql nvarchar(max)
set #sql ='ZJNB015,ZJNB014,ZJNB008,ZJNB005,ZJJX018,ZJJX013,ZJJX011,ZJJX007,ZJHZ092,ZJHZ090,ZJHZ088,ZJHZ086,ZJHZ066,ZJHZ063,ZJHZ061,ZJHZ058,ZJHZ047,ZJHZ009,YNKM156,YNKM155,YNKM153,YNKM152,YNKM151,YNKM150,YNKM148,YNKM147,YNKM146,YNKM144,YNKM143,YNKM142,YNKM141,YNKM133,YNKM132,YNKM130,YNKM128,YNKM127,YNKM125,YNKM124,YNKM098,YNKM097,YNKM093,YNKM092,YNKM085,YNKM079,YNKM059,YNKM057,YNKM025,YNKM019,YNKM017,YNKM015,YNKM013,YNKM012,YNKM011,YNKM009,YNKM008,YNKM007,YNKM006,YNKM005,XJWLMQ047,XJWLMQ038,XJWLMQ022,XJWLMQ014,TJTJ129,TJTJ104,TJTJ090,TJTJ089,TJTJ085,TJTJ084,TJTJ065,TJTJ061,TJTJ058,TJTJ055,TJTJ050,TJTJ038,TJTJ036,TJTJ026,TJTJ024,TJTJ022,TJTJ021,TJTJ019,TJTJ018,TJTJ015,TJTJ009,TJTJ008,TJTJ003,SXYC001,SXXA037,SXXA027,SXXA021,SXXA020,SXXA013,SXXA012,SXXA011,SXXA005,SXXA002,SXTY044,SXTY039,SXTY032,SXTY024,SXTY022,SXTY012,SXTY009,SXTY008,SXDT001,SX006222,SX006183,SX006176,SX006152,SX005976,SX005937,SX005799,SX005668,SX005407,SX000825,SX000403,SX000194,SX000171,SX000130,SX000081,SX000078,SX000045,SX000036,SX000018,SX000003,SNC001,SHSH167,SHSH165,SHSH164,SHSH163,SHSH162,SHSH161,SHSH158,SHSH157,SHSH155,SHSH154,SHSH153,SHSH148,SHSH147,SHSH144,SHSH137,SHSH132,SHSH125,SHSH123,SHSH122,SHSH119,SHSH118,SHSH112,SHSH106,SHSH095,SHSH094,SHSH092,SHSH075,SHSH068,SHSH051,SHSH034,SHSH029,SHSH023,SHSH014,SHSH011,SHSH010,SHSH008,SHSH006,SHSH005,SHSH004,SDWZB006,SDWTA002,SDWTA001,SDWJN022,SDWH003,SDQD020,SDQD008,SDJN016,SDJN008,SDCD064,SDCD062,SDCD059,SCYB007,SCNJ010,SCNC022,SCMY029,SCMY028,SCMY014,SCLZ019,SCLS016,SCGY010,SCDY011,SCDY007,SCCD200,SCCD199,SCCD198,SCCD197,SCCD196,SCCD195,SCCD194,SCCD193,SCCD192,SCCD191,SCCD188,SCCD187,SCCD186,SCCD185,SCCD183,SCCD182,SCCD181,SCCD179,SCCD176,SCCD174,SCCD173,SCCD172,SCCD171,SCCD166,SCCD165,SCCD164,SCCD163,SCCD162,SCCD161,SCCD160,SCCD158,SCCD157,SCCD152,SCCD150,SCCD144,SCCD136,SCCD123,SCCD117,SCCD110,SCCD102,SCCD080,SCCD053,SCCD051,SCCD040,SCCD031,SCCD025,SCCD020,SCCD019,SCCD017,SCCD013,SCCD004,SCCD003,SCCD002,QHXN006,QHXN005,QHXN004,NMHHHT003,NMHHHT002,NMBT001,LNSY034,LNSY017,LNSY010,LNSY006,LNSY002,LNSY001,LNJZ008,LNDL030,LNDL016,LNDL008,LNDL005,LNDL002,LNAS008,LNAS004,JXYC109,JXYC065,JXNC1001,JXNC098,JXNC082,JXNC073,JXNC069,JXNC067,JXNC066,JXNC065,JXNC064,JXNC063,JXNC062,JXNC045,JXNC026,JXNC003,JXJJ063,JXJJ061,JXJJ012,JXGZ110,JXGZ106,JXGZ1006,JXGZ1004,JXGZ085,JXGZ068,JXGZ031,JXGZ015,JXGZ011,JXGZ007,JXFZ101,JSZJ010,JSZJ002,JSYZ082,JSYZ081,JSYZ080,JSYZ076,JSYZ075,JSYZ074,JSYZ069,JSYZ067,JSXZ071,JSXZ070,JSXZ068,JSXZ067,JSXZ066,JSXZ064,JSXZ063,JSXZ058,JSXZ057,JSXZ053,JSXZ052,JSXZ051,JSXZ050,JSXZ049,JSXZ046,JSXZ043,JSXZ025,JSXZ022,JSXZ020,JSXZ012,JSXZ011,JSXZ007,JSWX057,JSWX056,JSWX055,JSWX053,JSWX052,JSWX051,JSWX050,JSWX047,JSWX045,JSWX042,JSWX041,JSWX038,JSWX032,JSWX030,JSWX029,JSWX016,JSWX014,JSSZ062,JSSZ061,JSSZ056,JSSZ054,JSSZ052,JSSZ049,JSSZ034,JSSZ031,JSSZ030,JSSZ026,JSSZ023,JSSZ020,JSSZ004,JSSZ002,JSSQ022,JSNT014,JSNT013,JSNJ32,JSNJ093,JSNJ092,JSNJ089,JSNJ087,JSNJ086,JSNJ085,JSNJ084,JSNJ081,JSNJ079,JSNJ078,JSNJ075,JSNJ074,JSNJ071,JSNJ070,JSNJ069,JSNJ066,JSNJ065,JSNJ064,JSNJ063,JSNJ062,JSNJ061,JSNJ052,JSNJ042,JSNJ028,JSNJ026,JSNJ021,JSNJ017,JSNJ015,JSNJ013,JSNJ009,JSLYG104,JSLYG001,JSKS003,JSKS002,JSHA027,JSHA026,JSHA025,JSHA021,JNDZ2,JLJL001,JLCC045,JLCC033,JLCC024,JLCC016,JLCC010,JLCC003,IN995904,IN994165,IN994017,IN976180,IN974591,IN0510360,IN018611,IN017781,IN0176312,IN0174673,IN016272,IN0157453,IN0153814,IN0152570,IN0139922,IN0139920,IN0136951,IN0136160,IN012803,IN0126336,IN0123703,IN011648,IN0115515,IN0099299,IN0092308,IN007290,IN007253,IN006969,IN0066740,IN005618,IN005452,IN005309,IN0051963,IN005110,IN005109,IN005106,IN0050678,IN004129,IN004113,IN004103,IN0032362,IN0028960,IN0028115,IN0023061,IN002245,IN002214,IN0021930,IN002072,IN002035,IN001925,IN001827,IN0017119,IN001708,IN001620,IN001613,IN001611,IN001598,IN001577,IN001520,IN001454,IN001391,IN001374,IN001371,IN001367,IN001365,IN001360,IN001357,IN001345,IN001340,IN001335,IN001333,IN001300,IN001255,IN001248,IN001247,IN001240,IN001225,IN001211,IN001183,IN001181,IN001175,IN001173,IN001144,IN001096,IN001085,IN001073,IN0010637,IN001008,IN000997,IN000995,IN000984,IN000963,IN000958,IN000955,IN000930,IN000925,IN000885,IN000856,IN000813,IN000811,IN000772,IN000408,IN000334,IN000332,IN000325,IN000314,IN000267,IN000217,IN000148,IN000147,IN000145,IN000144,IN000126,IN000118,IN000117,IN000115,IN000114,IN000111,IN000107,IN000092,IN000086,IN000081,IN000073,IN000057,IN000051,IN000029,IN000026,IN000021,IN000018,IN000013,IN000006,HUNZZ077,HUNZZ062,HUNZZ003,HUNYY058,HUNYY002,HUNXT063,HUNSY072,HUNHY076,HUNHY061,HUNHY049,HUNHY008,HUNHY002,HUNHY001,HUNHH080,HUNCS090,HUNCS086,HUNCS085,HUNCS084,HUNCS082,HUNCS081,HUNCS079,HUNCS078,HUNCS076,HUNCS074,HUNCS069,HUNCS061,HUNCS051,HUNCS050,HUNCS046,HUNCS044,HUNCS043,HUNCS037,HUNCS032,HUNCS031,HUNCS012,HUNCS003,HUNCD059,HNZZ1004,HNZZ070,HNZZ064,HNZZ061,HNZZ060,HNZZ056,HNZZ055,HNZZ054,HNZZ052,HNZZ051,HNZZ049,HNZZ037,HNZZ035,HNZZ012,HNZZ011,HNZZ009,HNZZ008,HNZZ004,HNZZ003,HNXX065,HNXX008,HNXX002,HNNY086,HNNY085,HNNY084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N1559,BSDJN1509,BSDJN1508,BSDJN1506,BSDJN1421,BSDJN1416,BSDJN1349,BSDJN1236,BSDJN1129,BSDJN0960,BSDJN0954,BSDJN0785,BSDJN0560,BSDJN0469,BSDJN0109,BSDJN0070,BSDHZ0826,BSDDZ1624,BQHXN1615,BQHXN1564,BQHXN1512,BQHXN1405,BQHXN1347,BQHXN1346,BQHXN1138,BQHXN1095,BQHXN0841,BQHXN0825,BQHXN0770,BQHXN0722,BQHXN0540,BQHXN0533,BNXZW0832,BNXYC1563,BNXYC1562,BNXYC1561,BNXYC1510,BNXYC1463,BNXYC1426,BNXYC1404,BNXYC1344,BNXYC1258,BNXYC1216,BNXYC1167,BNXYC1092,BNXYC1084,BNXYC0903,BNXYC0884,BNXYC0831,BNXYC0626,BNXYC0562,BNXYC0432,BNXYC0392,BNXYC0325,BNXWZ0498,BNXWZ0497,BNMHHHT0716,BNMHHHT0566,BNMHHHT0423,BNMHHHT0393,BNMHHHT0266,BNMCF1220,BNMCF0928,BNMBT1385,BNMBT1335,BNMBT0715,BLNTL0875,BLNSY1603,BLNSY1539,BLNSY1491,BLNSY1471,BLNSY1455,BLNSY1334,BLNSY1046,BLNSY0987,BLNSY0949,BLNSY0702,BLNSY0698,BLNSY0574,BLNSY0490,BLNKY0641,BLNJZ1547,BLNJZ1523,BLNJZ1498,BLNJZ1137,BLNJZ1034,BLNJZ0644,BLNDL1535,BLNDL1360,BLNDL1341,BLNDL0945,BLNDL0940,BLNDL0882,BLNDL0726,BLNDL0635,BLNDL0595,BLNDL0419,BLNDL0251,BLNAS1501,BLNAS1379,BJLJL1377,BJLCC1224,BJLCC1187,BJLCC1169,BJLCC1159,BJLCC0976,BJLCC0913,BJLCC0798,BJLCC0743,BJLCC0295,BJBJ305,BJBJ300,BJBJ247,BJBJ245,BJBJ211,BJBJ202,BJBJ119,BJBJ114,BJBJ109,BJBJ090,BJBJ087,BJBJ082,BJBJ067,BJBJ066,BJBJ062,BJBJ057,BJBJ056,BJBJ054,BJBJ049,BJBJ048,BJBJ041,BJBJ038,BJBJ029,BJBJ027,BJBJ025,BJBJ011,BJBJ008,BJBJ007,BJBJ004,BJBJ002,BJBJ001,BHLJSH1548,BHLJMDJ1292,BHLJHEB1597,BHLJHEB1549,BHLJHEB1383,BHLJHEB1372,BHLJHEB1343,BHLJHEB1332,BHLJHEB0935,BHLJHEB0800,BHLJHEB0594,BHLJHEB0582,BHLJHEB0264,BHLJHEB0263,BHBXT0513,BHBSJZ1596,BHBSJZ1348,BHBSJZ1310,BHBSJZ1309,BHBSJZ1302,BHBSJZ1223,BHBSJZ1212,BHBSJZ0919,BHBSJZ0873,BHBSJZ0495,BHBSJZ0329,BHBSJZ0324,BHBQHD1436,BHBQHD0805,BHBQHD0585,BHBQHD0459,BHBHD1249,BHBCD1311,BHBBD0858,BHBBD0520,BHBBD0321,BGSLZ1616,BGSLZ1577,BGSLZ1428,BGSLZ1424,BGSLZ1307,BGSLZ1299,BGSLZ1173,BGSLZ0994,BGSLZ0979,BGSLZ0978,BGSLZ0956,BGSLZ0955,BGSLZ0933,BGSLZ0927,BGSLZ0812,BGSLZ0694,BGSLZ0576,BGSLZ0431,BGSLZ0402,BGSLZ0296,BGSLZ0014,BBSWH20019,BBSSH20007,BBSSH20001,BBSSCCD20015,BBSNSXTY10001,BBSLN20008,BBSLN20005,BBSJSSZ20001,BBSHEN20005,BBSHEB20004,BBSCQCQ20004,BBJBJ520,BBJBJ1621,BBJBJ1618,BBJBJ1583,BBJBJ1579,BBJBJ1556,BBJBJ1555,BBJBJ1554,BBJBJ1546,BBJBJ1545,BBJBJ1544,BBJBJ1528,BBJBJ1527,BBJBJ1520,BBJBJ1519,BBJBJ1494,BBJBJ1489,BBJBJ1487,BBJBJ1484,BBJBJ1482,BBJBJ1479,BBJBJ1478,BBJBJ1433,BBJBJ1432,BBJBJ1418,BBJBJ1397,BBJBJ1396,BBJBJ1386,BBJBJ1368,BBJBJ1338,BBJBJ1336,BBJBJ1329,BBJBJ1317,BBJBJ1316,BBJBJ1315,BBJBJ1265,BBJBJ1264,BBJBJ1255,BBJBJ1238,BBJBJ1191,BBJBJ1171,BBJBJ1145,BBJBJ1116,BBJBJ1093,BBJBJ1071,BBJBJ1054,BBJBJ1044,BBJBJ0985,BBJBJ0853,BBJBJ0838,BBJBJ0821,BBJBJ0802,BBJBJ0665,BBJBJ0638,BBJBJ0637,BBJBJ0611,BBJBJ0558,BBJBJ0557,BBJBJ0556,BBJBJ0552,BBJBJ0525,BBJBJ0482,BBJBJ0450,BBJBJ0006,ANWH026,ANWH024,ANWH023,ANWH022,ANWH020,ANWH019,ANWH011,ANWH006,ANWH004,ANWH003,ANTL008,ANMAS014,ANMAS013,ANMAS005,ANMAS001,ANLA010,ANLA006,ANLA004,ANLA003,ANHF063,ANHF062,ANHF061,ANHF060,ANHF059,ANHF058,ANHF057,ANHF056,ANHF055,ANHF053,ANHF051,ANHF049,ANHF048,ANHF047,ANHF044,ANHF042,ANHF039,ANHF035,ANHF034,ANHF026,ANHF019,ANHF013,ANHF010,ANHF008,ANFY034,ANFY032,ANFY002,AHWH028,AHWH027,AHSZ022,AHSZ009,AHHN022,AHHB100,AHBZ030,AHBB022,AHBB020,AHAQ007'
select * from dbo.STRING_SPLIT(#sql,',')

If your database compatibility level is lower than 130, SQL Server will not be able to find and execute STRING_SPLIT function. You can change a compatibility level of database using the following command:
ALTER DATABASE DatabaseName SET COMPATIBILITY_LEVEL = 130
Note that compatibility level 120 might be default even in new Azure SQL Databases.
For reference:
Version - Highest Compatibility Level - Lowest Available Level
SQL 2017 - 140 - 100
SQL 2016 - 130 - 100
SQL 2014 - 120 - 100
SQL 2012 - 110 - 90
SQL 2008 - 100 - 80
SQL 2005 - 90 - 80
SQL 2000 - 80 - 80
Also, check your syntax as well like:
SELECT Value FROM STRING_SPLIT('Lorem ipsum dolor sit amet.', ' ');

You Can try this function
CREATE FUNCTION [dbo].[fnSplitString]
(
#string NVARCHAR(MAX),
#delimiter CHAR(1)
)
RETURNS #output TABLE(splitdata NVARCHAR(MAX)
)
BEGIN
DECLARE #start INT, #end INT
SELECT #start = 1, #end = CHARINDEX(#delimiter, #string)
WHILE #start < LEN(#string) + 1 BEGIN
IF #end = 0
SET #end = LEN(#string) + 1
INSERT INTO #output (splitdata)
VALUES(SUBSTRING(#string, #start, #end - #start))
SET #start = #end + 1
SET #end = CHARINDEX(#delimiter, #string, #start)
END
RETURN
END
EXAMPLE
DECLARE #StringArray VARCHAR(max)
Set #StringArray= 'a,b,c,d,f';
select * from dbo.fnSplitString(#StringArray,',')

I made this as a quick and dirty substitute using the table approach so the end user can select which of the sections they want. The original string can be used in a join or the individual row selected for a scalar result. Tested in
Microsoft SQL Server 2012 (SP4-OD) (KB4091266) - 11.0.7469.6 (X64) Feb 28 2018 17:47:20 Copyright (c) Microsoft Corporation Enterprise Edition (64-bit) on Windows NT 6.3 (Build 9600: ) (Hypervisor)
SET QUOTED_IDENTIFIER ON;
SET ANSI_NULLS ON;
GO
Create FUNCTION dbo.StringSplit2012
(
#OriginalString VARCHAR(500)
,#Separator VARCHAR(6)
)
RETURNS #Sections TABLE
(
OriginalString VARCHAR(500) NOT NULL
,StringSection VARCHAR(500) NULL
,SectionNumber INT
)
AS
BEGIN
DECLARE #SectionCount INT;
DECLARE #LoopCounter INT = 1;
DECLARE #RemainingString VARCHAR(500);
DECLARE #CurrentSection VARCHAR(500);
SET #SectionCount =
LEN (#OriginalString) - LEN (REPLACE (#OriginalString, #Separator, ''));
IF #SectionCount = 0
BEGIN
INSERT INTO
#Sections
(
OriginalString
,StringSection
,SectionNumber
)
VALUES
(#OriginalString -- OriginalString - varchar(500)
,#OriginalString -- StringSection - varchar(500)
,1 -- SectionNumber - int
);
END;
ELSE
BEGIN
SET #RemainingString = #OriginalString;
DECLARE #SectionStart INT;
DECLARE #SectionLength INT;
WHILE #LoopCounter <= #SectionCount
BEGIN
SET #SectionStart = 1;
SET #SectionLength = CHARINDEX (#Separator, #RemainingString);
SET #CurrentSection = LEFT(#RemainingString, #SectionLength - 1);
INSERT INTO
#Sections
(
OriginalString
,StringSection
,SectionNumber
)
VALUES
(#OriginalString
,#CurrentSection
,#LoopCounter -- SectionNumber - int
);
SET #RemainingString =
RIGHT(#RemainingString, LEN (#RemainingString) - #SectionLength);
SET #LoopCounter = #LoopCounter + 1;
END;
DECLARE #TotalParsedLength INT =
(
SELECT SUM ( LEN (s.StringSection)) FROM #Sections AS s
) + #SectionCount;
SET #CurrentSection =
RIGHT(#RemainingString, LEN (#OriginalString) - #TotalParsedLength);
INSERT INTO
#Sections
(
OriginalString
,StringSection
,SectionNumber
)
VALUES
(#OriginalString
,#CurrentSection
,#LoopCounter -- SectionNumber - int
);
END;
RETURN;
END;
GO
I hope this saves someone some time. I use STRING_SPLIT in the function I created to give me the package name from a job step's command, and it blew up when I moved to my 2012 server. So I wrote my own. (Like ya do!)
Joey Morgan
BI/Integrations Developer III
Aspen Dental Management, Inc
Syracuse, NY

Related

Split data from colon into new column

I have got a scenario where I want to split my data from colon into new column.
E.g YR:136;YR:50;JN:275;YM:138;IN:477;WO:150;G1:10;F2:10.
What I am looking for is this:
YR 136
YR 50
JN 275
YM 138
Can anybody tell me how to achieve this? Any help would be much appreciated.

for SQL 2016 and later you can use STRING_SPLIT. If not, search for CSV Spliter
declare #str varchar(100) = 'YR:136;YR:50;JN:275;YM:138;IN:477;WO:150;G1:10;F2:10'
select parsename(replace(value, ':', '.'), 2),
parsename(replace(value, ':', '.'), 1)
from string_split(#str, ';')

Hope the string will in the specified format every time. What I did was, first copied the same string to a new variable and added an extra ; to the end. Then used a WHILE loop to split each part before each ;. Then used LEFT and RIGHT function to take the parts before and after : from the splitted part. And inserted those values to a table variable #t.
Code
declare #str as varchar(max) ='YR:136;YR:50;JN:275;YM:138;IN:477;WO:150;G1:10;F2:10';
declare #rows as int;
set #rows = len(#str) - len(replace(#str, ';',''));
declare #t as table([col1] varchar(100), [col2] int);
declare #i as int;
set #i = 0;
declare #str2 as varchar(max);
set #str2 = #str + ';';
while(#i <= #rows)
begin
declare #col as varchar(100);
set #col = left(#str2, charindex(';', #str2, 1) - 1);
set #str2 = right(#str2, len(#str2) - charindex(';', #str2, 1));
insert into #t([col1], [col2])
select
left(#col, charindex(':', #col, 1) - 1),
right(#col, charindex(':', reverse(#col), 1) - 1);
set #i += 1;
end
select * from #t;
Find a demo here

First CREATE the function:
CREATE FUNCTION dbo.fnSplit(
#sInputList VARCHAR(8000) -- List of delimited items
, #sDelimiter VARCHAR(8000) = ',' -- delimiter that separates items
) RETURNS #List TABLE (item VARCHAR(8000))
BEGIN
DECLARE #sItem VARCHAR(8000)
WHILE CHARINDEX(#sDelimiter,#sInputList,0) <> 0
BEGIN
SELECT
#sItem=RTRIM(LTRIM(SUBSTRING(#sInputList,1,CHARINDEX(#sDelimiter,#sInputList,0)-1))),
#sInputList=RTRIM(LTRIM(SUBSTRING(#sInputList,CHARINDEX(#sDelimiter,#sInputList,0)+LEN(#sDelimiter),LEN(#sInputList))))
IF LEN(#sItem) > 0
INSERT INTO #List SELECT #sItem
END
IF LEN(#sInputList) > 0
INSERT INTO #List SELECT #sInputList -- Put the last item in
RETURN
END
GO
Then try this:
DECLARE #X VARCHAR(100), #Val VARCHAR(250) = 'YR:136;YR:50;JN:275;YM:138;IN:477;WO:150;G1:10;F2:10'
SELECT LEFT(value,CHARINDEX(':',value) - 1)A
,RIGHT(value,CHARINDEX(':',REVERSE(value)) - 1)B
FROM dbo.fn_Split(#Val,';')
Output:
A B
YR 136
YR 50
JN 275
YM 138
IN 477
WO 150
G1 10
F2 10

In SQL Server you can do that using STRING_SPLIT.
For more information read the documentation:
https://learn.microsoft.com/en-us/sql/t-sql/functions/string-split-transact-sql?view=sql-server-2017

--FOR SQL SERVER 2016+
DECLARE #str VARCHAR(100) = 'YR:136;YR:50;JN:275;YM:138;IN:477;WO:150;G1:10;F2:10'
SELECT SUBSTRING(value,0,CHARINDEX(':',value,0)) Id
, SUBSTRING(value,CHARINDEX(':',value,0)+1,100) Vals
FROM STRING_SPLIT(#str, ';')
--FOR Older SQL SERVER
DECLARE #x AS XML=''
SET #x = CAST('<A>'+ REPLACE(#str,';','</A><A>')+ '</A>' AS XML)
SELECT SUBSTRING(t.value('.', 'VARCHAR(MAX)') ,0,CHARINDEX(':',t.value('.', 'VARCHAR(MAX)') ,0)) Id
, SUBSTRING(t.value('.', 'VARCHAR(MAX)') ,CHARINDEX(':',t.value('.', 'VARCHAR(MAX)') ,0)+1,100) Vals
FROM #x.nodes('/A') AS x(t)

Try this below function
CREATE FUNCTION [dbo].[udf_GetUnsplitGivenData]
(
#string nvarchar(max)
)
RETURNS #OutTable TABLE
(
COl1 nvarchar(max),
COl2 nvarchar(max)
)
AS
BEGIN
DECLARE #Temp AS TABLE
(
DATA nvarchar(max)
)
INSERT INTO #Temp
SELECT #string
INSERT INTO #OutTable(COl1,COl2)
SELECT SUBSTRING(Data,1,CHARINDEX(':',Data )-1) AS COl1,
SUBSTRING(Data,CHARINDEX(':',Data )+1,LEN(Data)) AS COl2
FROM
(
SELECT Split.a.value('.','nvarchar(100)') AS Data
FROM
(
SELECT
CAST( '<S>'+REPLACE(Data,';','</S><S>')+'</S>' AS XML ) AS Data
FROM #Temp
) AS A
CROSS APPLY data.nodes('S') AS Split(a)
)dt
RETURN
END
SELECT * FROM [dbo].[udf_GetUnsplitGivenData] (
'YR:136;YR:50;JN:275;YM:138;IN:477;WO:150;G1:10;F2:10')
GO
Result
COl1 COl2
------------
YR 136
YR 50
JN 275
YM 138
IN 477
WO 150
G1 10
F2 10

How to extract words from a sentence in SQL Server? [duplicate]

I have a SQL Server 2008 R2 column containing a string which I need to split by a comma. I have seen many answers on StackOverflow but none of them works in R2. I have made sure I have select permissions on any split function examples. Any help greatly appreciated.

I've used this SQL before which may work for you:-
CREATE FUNCTION dbo.splitstring ( #stringToSplit VARCHAR(MAX) )
RETURNS
#returnList TABLE ([Name] [nvarchar] (500))
AS
BEGIN
DECLARE #name NVARCHAR(255)
DECLARE #pos INT
WHILE CHARINDEX(',', #stringToSplit) > 0
BEGIN
SELECT #pos = CHARINDEX(',', #stringToSplit)
SELECT #name = SUBSTRING(#stringToSplit, 1, #pos-1)
INSERT INTO #returnList
SELECT #name
SELECT #stringToSplit = SUBSTRING(#stringToSplit, #pos+1, LEN(#stringToSplit)-#pos)
END
INSERT INTO #returnList
SELECT #stringToSplit
RETURN
END
and to use it:-
SELECT * FROM dbo.splitstring('91,12,65,78,56,789')

Instead of recursive CTEs and while loops, has anyone considered a more set-based approach? Note that this function was written for the question, which was based on SQL Server 2008 and comma as the delimiter. In SQL Server 2016 and above (and in compatibility level 130 and above), STRING_SPLIT() is a better option.
CREATE FUNCTION dbo.SplitString
(
#List nvarchar(max),
#Delim nvarchar(255)
)
RETURNS TABLE
AS
RETURN ( SELECT [Value] FROM
(
SELECT [Value] = LTRIM(RTRIM(SUBSTRING(#List, [Number],
CHARINDEX(#Delim, #List + #Delim, [Number]) - [Number])))
FROM (SELECT Number = ROW_NUMBER() OVER (ORDER BY name)
FROM sys.all_columns) AS x WHERE Number <= LEN(#List)
AND SUBSTRING(#Delim + #List, [Number], DATALENGTH(#Delim)/2) = #Delim
) AS y
);
GO
If you want to avoid the limitation of the length of the string being <= the number of rows in sys.all_columns (9,980 in model in SQL Server 2017; much higher in your own user databases), you can use other approaches for deriving the numbers, such as building your own table of numbers. You could also use a recursive CTE in cases where you can't use system tables or create your own:
CREATE FUNCTION dbo.SplitString
(
#List nvarchar(max),
#Delim nvarchar(255)
)
RETURNS TABLE WITH SCHEMABINDING
AS
RETURN ( WITH n(n) AS (SELECT 1 UNION ALL SELECT n+1
FROM n WHERE n <= LEN(#List))
SELECT [Value] = SUBSTRING(#List, n,
CHARINDEX(#Delim, #List + #Delim, n) - n)
FROM n WHERE n <= LEN(#List)
AND SUBSTRING(#Delim + #List, n, DATALENGTH(#Delim)/2) = #Delim
);
GO
But you'll have to append OPTION (MAXRECURSION 0) (or MAXRECURSION <longest possible string length if < 32768>) to the outer query in order to avoid errors with recursion for strings > 100 characters. If that is also not a good alternative then see this answer as pointed out in the comments, or this answer if you need an ordered split string function.
(Also, the delimiter will have to be NCHAR(<=1228). Still researching why.)
More on split functions, why (and proof that) while loops and recursive CTEs don't scale, and better alternatives, if you're splitting strings coming from the application layer:
Splitting strings

Finally the wait is over in SQL Server 2016 they have introduced Split string function : STRING_SPLIT
select * From STRING_SPLIT ('a,b', ',') cs
All the other methods to split string like XML, Tally table, while loop, etc.. has been blown away by this STRING_SPLIT function.
Here is an excellent article with performance comparison : Performance Surprises and Assumptions : STRING_SPLIT

The easiest way to do this is by using XML format.
1. Converting string to rows without table
QUERY
DECLARE #String varchar(100) = 'String1,String2,String3'
-- To change ',' to any other delimeter, just change ',' to your desired one
DECLARE #Delimiter CHAR = ','
SELECT LTRIM(RTRIM(Split.a.value('.', 'VARCHAR(100)'))) 'Value'
FROM
(
SELECT CAST ('<M>' + REPLACE(#String, #Delimiter, '</M><M>') + '</M>' AS XML) AS Data
) AS A
CROSS APPLY Data.nodes ('/M') AS Split(a)
RESULT
x---------x
| Value |
x---------x
| String1 |
| String2 |
| String3 |
x---------x
2. Converting to rows from a table which have an ID for each CSV row
SOURCE TABLE
x-----x--------------------------x
| Id | Value |
x-----x--------------------------x
| 1 | String1,String2,String3 |
| 2 | String4,String5,String6 |
x-----x--------------------------x
QUERY
-- To change ',' to any other delimeter, just change ',' before '</M><M>' to your desired one
DECLARE #Delimiter CHAR = ','
SELECT ID,LTRIM(RTRIM(Split.a.value('.', 'VARCHAR(100)'))) 'Value'
FROM
(
SELECT ID,CAST ('<M>' + REPLACE(VALUE, #Delimiter, '</M><M>') + '</M>' AS XML) AS Data
FROM TABLENAME
) AS A
CROSS APPLY Data.nodes ('/M') AS Split(a)
RESULT
x-----x----------x
| Id | Value |
x-----x----------x
| 1 | String1 |
| 1 | String2 |
| 1 | String3 |
| 2 | String4 |
| 2 | String5 |
| 2 | String6 |
x-----x----------x

I needed a quick way to get rid of the +4 from a zip code.
UPDATE #Emails
SET ZIPCode = SUBSTRING(ZIPCode, 1, (CHARINDEX('-', ZIPCODE)-1))
WHERE ZIPCode LIKE '%-%'
No proc... no UDF... just one tight little inline command that does what it must. Not fancy, not elegant.
Change the delimiter as needed, etc, and it will work for anything.

if you replace
WHILE CHARINDEX(',', #stringToSplit) > 0
with
WHILE LEN(#stringToSplit) > 0
you can eliminate that last insert after the while loop!
CREATE FUNCTION dbo.splitstring ( #stringToSplit VARCHAR(MAX) )
RETURNS
#returnList TABLE ([Name] [nvarchar] (500))
AS
BEGIN
DECLARE #name NVARCHAR(255)
DECLARE #pos INT
WHILE LEN(#stringToSplit) > 0
BEGIN
SELECT #pos = CHARINDEX(',', #stringToSplit)
if #pos = 0
SELECT #pos = LEN(#stringToSplit)
SELECT #name = SUBSTRING(#stringToSplit, 1, #pos-1)
INSERT INTO #returnList
SELECT #name
SELECT #stringToSplit = SUBSTRING(#stringToSplit, #pos+1, LEN(#stringToSplit)-#pos)
END
RETURN
END

The often used approach with XML elements breaks in case of forbidden characters. This is an approach to use this method with any kind of character, even with the semicolon as delimiter.
The trick is, first to use SELECT SomeString AS [*] FOR XML PATH('') to get all forbidden characters properly escaped. That's the reason, why I replace the delimiter to a magic value to avoid troubles with ; as delimiter.
DECLARE #Dummy TABLE (ID INT, SomeTextToSplit NVARCHAR(MAX))
INSERT INTO #Dummy VALUES
(1,N'A&B;C;D;E, F')
,(2,N'"C" & ''D'';<C>;D;E, F');
DECLARE #Delimiter NVARCHAR(10)=';'; --special effort needed (due to entities coding with "&code;")!
WITH Casted AS
(
SELECT *
,CAST(N'<x>' + REPLACE((SELECT REPLACE(SomeTextToSplit,#Delimiter,N'§§Split$me$here§§') AS [*] FOR XML PATH('')),N'§§Split$me$here§§',N'</x><x>') + N'</x>' AS XML) AS SplitMe
FROM #Dummy
)
SELECT Casted.ID
,x.value(N'.',N'nvarchar(max)') AS Part
FROM Casted
CROSS APPLY SplitMe.nodes(N'/x') AS A(x)
The result
ID Part
1 A&B
1 C
1 D
1 E, F
2 "C" & 'D'
2 <C>
2 D
2 E, F

All the functions for string splitting that use some kind of Loop-ing (iterations) have bad performance. They should be replaced with set-based solution.
This code executes excellent.
CREATE FUNCTION dbo.SplitStrings
(
#List NVARCHAR(MAX),
#Delimiter NVARCHAR(255)
)
RETURNS TABLE
WITH SCHEMABINDING
AS
RETURN
(
SELECT Item = y.i.value('(./text())[1]', 'nvarchar(4000)')
FROM
(
SELECT x = CONVERT(XML, '<i>'
+ REPLACE(#List, #Delimiter, '</i><i>')
+ '</i>').query('.')
) AS a CROSS APPLY x.nodes('i') AS y(i)
);
GO

I had to write something like this recently. Here's the solution I came up with. It's generalized for any delimiter string and I think it would perform slightly better:
CREATE FUNCTION [dbo].[SplitString]
( #string nvarchar(4000)
, #delim nvarchar(100) )
RETURNS
#result TABLE
( [Value] nvarchar(4000) NOT NULL
, [Index] int NOT NULL )
AS
BEGIN
DECLARE #str nvarchar(4000)
, #pos int
, #prv int = 1
SELECT #pos = CHARINDEX(#delim, #string)
WHILE #pos > 0
BEGIN
SELECT #str = SUBSTRING(#string, #prv, #pos - #prv)
INSERT INTO #result SELECT #str, #prv
SELECT #prv = #pos + LEN(#delim)
, #pos = CHARINDEX(#delim, #string, #pos + 1)
END
INSERT INTO #result SELECT SUBSTRING(#string, #prv, 4000), #prv
RETURN
END

If you need a quick ad-hoc solution for common cases with minimum code, then this recursive CTE two-liner will do it:
DECLARE #s VARCHAR(200) = ',1,2,,3,,,4,,,,5,'
;WITH
a AS (SELECT i=-1, j=0 UNION ALL SELECT j, CHARINDEX(',', #s, j + 1) FROM a WHERE j > i),
b AS (SELECT SUBSTRING(#s, i+1, IIF(j>0, j, LEN(#s)+1)-i-1) s FROM a WHERE i >= 0)
SELECT * FROM b
Either use this as a stand-alone statement or just add the above CTEs to any of your queries and you will be able to join the resulting table b with others for use in any further expressions.
edit (by Shnugo)
If you add a counter, you will get a position index together with the List:
DECLARE #s VARCHAR(200) = '1,2333,344,4'
;WITH
a AS (SELECT n=0, i=-1, j=0 UNION ALL SELECT n+1, j, CHARINDEX(',', #s, j+1) FROM a WHERE j > i),
b AS (SELECT n, SUBSTRING(#s, i+1, IIF(j>0, j, LEN(#s)+1)-i-1) s FROM a WHERE i >= 0)
SELECT * FROM b;
The result:
n s
1 1
2 2333
3 344
4 4

I take the xml route by wrapping the values into elements (M but anything works):
declare #v nvarchar(max) = '100,201,abcde'
select
a.value('.', 'varchar(max)')
from
(select cast('<M>' + REPLACE(#v, ',', '</M><M>') + '</M>' AS XML) as col) as A
CROSS APPLY A.col.nodes ('/M') AS Split(a)

A solution using a CTE, if anyone should need that (apart from me, who obviously did, that is why I wrote it).
declare #StringToSplit varchar(100) = 'Test1,Test2,Test3';
declare #SplitChar varchar(10) = ',';
with StringToSplit as (
select
ltrim( rtrim( substring( #StringToSplit, 1, charindex( #SplitChar, #StringToSplit ) - 1 ) ) ) Head
, substring( #StringToSplit, charindex( #SplitChar, #StringToSplit ) + 1, len( #StringToSplit ) ) Tail
union all
select
ltrim( rtrim( substring( Tail, 1, charindex( #SplitChar, Tail ) - 1 ) ) ) Head
, substring( Tail, charindex( #SplitChar, Tail ) + 1, len( Tail ) ) Tail
from StringToSplit
where charindex( #SplitChar, Tail ) > 0
union all
select
ltrim( rtrim( Tail ) ) Head
, '' Tail
from StringToSplit
where charindex( #SplitChar, Tail ) = 0
and len( Tail ) > 0
)
select Head from StringToSplit

This is more narrowly-tailored. When I do this I usually have a comma-delimited list of unique ids (INT or BIGINT), which I want to cast as a table to use as an inner join to another table that has a primary key of INT or BIGINT. I want an in-line table-valued function returned so that I have the most efficient join possible.
Sample usage would be:
DECLARE #IDs VARCHAR(1000);
SET #IDs = ',99,206,124,8967,1,7,3,45234,2,889,987979,';
SELECT me.Value
FROM dbo.MyEnum me
INNER JOIN dbo.GetIntIdsTableFromDelimitedString(#IDs) ids ON me.PrimaryKey = ids.ID
I stole the idea from http://sqlrecords.blogspot.com/2012/11/converting-delimited-list-to-table.html, changing it to be in-line table-valued and cast as INT.
create function dbo.GetIntIDTableFromDelimitedString
(
#IDs VARCHAR(1000) --this parameter must start and end with a comma, eg ',123,456,'
--all items in list must be perfectly formatted or function will error
)
RETURNS TABLE AS
RETURN
SELECT
CAST(SUBSTRING(#IDs,Nums.number + 1,CHARINDEX(',',#IDs,(Nums.number+2)) - Nums.number - 1) AS INT) AS ID
FROM
[master].[dbo].[spt_values] Nums
WHERE Nums.Type = 'P'
AND Nums.number BETWEEN 1 AND DATALENGTH(#IDs)
AND SUBSTRING(#IDs,Nums.number,1) = ','
AND CHARINDEX(',',#IDs,(Nums.number+1)) > Nums.number;
GO

There is a correct version on here but I thought it would be nice to add a little fault tolerance in case they have a trailing comma as well as make it so you could use it not as a function but as part of a larger piece of code. Just in case you're only using it once time and don't need a function. This is also for integers (which is what I needed it for) so you might have to change your data types.
DECLARE #StringToSeperate VARCHAR(10)
SET #StringToSeperate = '1,2,5'
--SELECT #StringToSeperate IDs INTO #Test
DROP TABLE #IDs
CREATE TABLE #IDs (ID int)
DECLARE #CommaSeperatedValue NVARCHAR(255) = ''
DECLARE #Position INT = LEN(#StringToSeperate)
--Add Each Value
WHILE CHARINDEX(',', #StringToSeperate) > 0
BEGIN
SELECT #Position = CHARINDEX(',', #StringToSeperate)
SELECT #CommaSeperatedValue = SUBSTRING(#StringToSeperate, 1, #Position-1)
INSERT INTO #IDs
SELECT #CommaSeperatedValue
SELECT #StringToSeperate = SUBSTRING(#StringToSeperate, #Position+1, LEN(#StringToSeperate)-#Position)
END
--Add Last Value
IF (LEN(LTRIM(RTRIM(#StringToSeperate)))>0)
BEGIN
INSERT INTO #IDs
SELECT SUBSTRING(#StringToSeperate, 1, #Position)
END
SELECT * FROM #IDs

I modified +Andy Robinson's function a little bit. Now you can select only required part from returning table:
CREATE FUNCTION dbo.splitstring ( #stringToSplit VARCHAR(MAX) )
RETURNS
#returnList TABLE ([numOrder] [tinyint] , [Name] [nvarchar] (500)) AS
BEGIN
DECLARE #name NVARCHAR(255)
DECLARE #pos INT
DECLARE #orderNum INT
SET #orderNum=0
WHILE CHARINDEX('.', #stringToSplit) > 0
BEGIN
SELECT #orderNum=#orderNum+1;
SELECT #pos = CHARINDEX('.', #stringToSplit)
SELECT #name = SUBSTRING(#stringToSplit, 1, #pos-1)
INSERT INTO #returnList
SELECT #orderNum,#name
SELECT #stringToSplit = SUBSTRING(#stringToSplit, #pos+1, LEN(#stringToSplit)-#pos)
END
SELECT #orderNum=#orderNum+1;
INSERT INTO #returnList
SELECT #orderNum, #stringToSplit
RETURN
END
Usage:
SELECT Name FROM dbo.splitstring('ELIS.YD.CRP1.1.CBA.MDSP.T389.BT') WHERE numOrder=5

Simples
DECLARE #String varchar(100) = '11,21,84,85,87'
SELECT * FROM TB_PAPEL WHERE CD_PAPEL IN (SELECT value FROM STRING_SPLIT(#String, ','))
-- EQUIVALENTE
SELECT * FROM TB_PAPEL WHERE CD_PAPEL IN (11,21,84,85,87)

here is a version that can split on a pattern using patindex, a simple adaptation of the post above. I had a case where I needed to split a string that contained multiple separator chars.
alter FUNCTION dbo.splitstring ( #stringToSplit VARCHAR(1000), #splitPattern varchar(10) )
RETURNS
#returnList TABLE ([Name] [nvarchar] (500))
AS
BEGIN
DECLARE #name NVARCHAR(255)
DECLARE #pos INT
WHILE PATINDEX(#splitPattern, #stringToSplit) > 0
BEGIN
SELECT #pos = PATINDEX(#splitPattern, #stringToSplit)
SELECT #name = SUBSTRING(#stringToSplit, 1, #pos-1)
INSERT INTO #returnList
SELECT #name
SELECT #stringToSplit = SUBSTRING(#stringToSplit, #pos+1, LEN(#stringToSplit)-#pos)
END
INSERT INTO #returnList
SELECT #stringToSplit
RETURN
END
select * from dbo.splitstring('stringa/stringb/x,y,z','%[/,]%');
result looks like this
stringa
stringb
x
y
z

Personnaly I use this function :
ALTER FUNCTION [dbo].[CUST_SplitString]
(
#String NVARCHAR(4000),
#Delimiter NCHAR(1)
)
RETURNS TABLE
AS
RETURN
(
WITH Split(stpos,endpos)
AS(
SELECT 0 AS stpos, CHARINDEX(#Delimiter,#String) AS endpos
UNION ALL
SELECT endpos+1, CHARINDEX(#Delimiter,#String,endpos+1)
FROM Split
WHERE endpos > 0
)
SELECT 'Id' = ROW_NUMBER() OVER (ORDER BY (SELECT 1)),
'Data' = SUBSTRING(#String,stpos,COALESCE(NULLIF(endpos,0),LEN(#String)+1)-stpos)
FROM Split
)

I have developed a double Splitter (Takes two split characters) as requested Here. Could be of some value in this thread seeing its the most referenced for queries relating to string splitting.
CREATE FUNCTION uft_DoubleSplitter
(
-- Add the parameters for the function here
#String VARCHAR(4000),
#Splitter1 CHAR,
#Splitter2 CHAR
)
RETURNS #Result TABLE (Id INT,MId INT,SValue VARCHAR(4000))
AS
BEGIN
DECLARE #FResult TABLE(Id INT IDENTITY(1, 1),
SValue VARCHAR(4000))
DECLARE #SResult TABLE(Id INT IDENTITY(1, 1),
MId INT,
SValue VARCHAR(4000))
SET #String = #String+#Splitter1
WHILE CHARINDEX(#Splitter1, #String) > 0
BEGIN
DECLARE #WorkingString VARCHAR(4000) = NULL
SET #WorkingString = SUBSTRING(#String, 1, CHARINDEX(#Splitter1, #String) - 1)
--Print #workingString
INSERT INTO #FResult
SELECT CASE
WHEN #WorkingString = '' THEN NULL
ELSE #WorkingString
END
SET #String = SUBSTRING(#String, LEN(#WorkingString) + 2, LEN(#String))
END
IF ISNULL(#Splitter2, '') != ''
BEGIN
DECLARE #OStartLoop INT
DECLARE #OEndLoop INT
SELECT #OStartLoop = MIN(Id),
#OEndLoop = MAX(Id)
FROM #FResult
WHILE #OStartLoop <= #OEndLoop
BEGIN
DECLARE #iString VARCHAR(4000)
DECLARE #iMId INT
SELECT #iString = SValue+#Splitter2,
#iMId = Id
FROM #FResult
WHERE Id = #OStartLoop
WHILE CHARINDEX(#Splitter2, #iString) > 0
BEGIN
DECLARE #iWorkingString VARCHAR(4000) = NULL
SET #IWorkingString = SUBSTRING(#iString, 1, CHARINDEX(#Splitter2, #iString) - 1)
INSERT INTO #SResult
SELECT #iMId,
CASE
WHEN #iWorkingString = '' THEN NULL
ELSE #iWorkingString
END
SET #iString = SUBSTRING(#iString, LEN(#iWorkingString) + 2, LEN(#iString))
END
SET #OStartLoop = #OStartLoop + 1
END
INSERT INTO #Result
SELECT MId AS PrimarySplitID,
ROW_NUMBER() OVER (PARTITION BY MId ORDER BY Mid, Id) AS SecondarySplitID ,
SValue
FROM #SResult
END
ELSE
BEGIN
INSERT INTO #Result
SELECT Id AS PrimarySplitID,
NULL AS SecondarySplitID,
SValue
FROM #FResult
END
RETURN
Usage:
--FirstSplit
SELECT * FROM uft_DoubleSplitter('ValueA=ValueB=ValueC=ValueD==ValueE&ValueA=ValueB=ValueC===ValueE&ValueA=ValueB==ValueD===','&',NULL)
--Second Split
SELECT * FROM uft_DoubleSplitter('ValueA=ValueB=ValueC=ValueD==ValueE&ValueA=ValueB=ValueC===ValueE&ValueA=ValueB==ValueD===','&','=')
Possible Usage (Get second value of each split):
SELECT fn.SValue
FROM uft_DoubleSplitter('ValueA=ValueB=ValueC=ValueD==ValueE&ValueA=ValueB=ValueC===ValueE&ValueA=ValueB==ValueD===', '&', '=')AS fn
WHERE fn.mid = 2

A recursive cte based solution
declare #T table (iden int identity, col1 varchar(100));
insert into #T(col1) values
('ROOT/South America/Lima/Test/Test2')
, ('ROOT/South America/Peru/Test/Test2')
, ('ROOT//South America/Venuzuala ')
, ('RtT/South America / ')
, ('ROOT/South Americas// ');
declare #split char(1) = '/';
select #split as split;
with cte as
( select t.iden, case when SUBSTRING(REVERSE(rtrim(t.col1)), 1, 1) = #split then LTRIM(RTRIM(t.col1)) else LTRIM(RTRIM(t.col1)) + #split end as col1, 0 as pos , 1 as cnt
from #T t
union all
select t.iden, t.col1 , charindex(#split, t.col1, t.pos + 1), cnt + 1
from cte t
where charindex(#split, t.col1, t.pos + 1) > 0
)
select t1.*, t2.pos, t2.cnt
, ltrim(rtrim(SUBSTRING(t1.col1, t1.pos+1, t2.pos-t1.pos-1))) as bingo
from cte t1
join cte t2
on t2.iden = t1.iden
and t2.cnt = t1.cnt+1
and t2.pos > t1.pos
order by t1.iden, t1.cnt;

With all due respect to #AviG this is the bug free version of function deviced by him to return all the tokens in full.
IF EXISTS (SELECT * FROM sys.objects WHERE type = 'TF' AND name = 'TF_SplitString')
DROP FUNCTION [dbo].[TF_SplitString]
GO
-- =============================================
-- Author: AviG
-- Amendments: Parameterize the delimeter and included the missing chars in last token - Gemunu Wickremasinghe
-- Description: Tabel valued function that Breaks the delimeted string by given delimeter and returns a tabel having split results
-- Usage
-- select * from [dbo].[TF_SplitString]('token1,token2,,,,,,,,token969',',')
-- 969 items should be returned
-- select * from [dbo].[TF_SplitString]('4672978261,4672978255',',')
-- 2 items should be returned
-- =============================================
CREATE FUNCTION dbo.TF_SplitString
( #stringToSplit VARCHAR(MAX) ,
#delimeter char = ','
)
RETURNS
#returnList TABLE ([Name] [nvarchar] (500))
AS
BEGIN
DECLARE #name NVARCHAR(255)
DECLARE #pos INT
WHILE LEN(#stringToSplit) > 0
BEGIN
SELECT #pos = CHARINDEX(#delimeter, #stringToSplit)
if #pos = 0
BEGIN
SELECT #pos = LEN(#stringToSplit)
SELECT #name = SUBSTRING(#stringToSplit, 1, #pos)
END
else
BEGIN
SELECT #name = SUBSTRING(#stringToSplit, 1, #pos-1)
END
INSERT INTO #returnList
SELECT #name
SELECT #stringToSplit = SUBSTRING(#stringToSplit, #pos+1, LEN(#stringToSplit)-#pos)
END
RETURN
END

This is based on Andy Robertson's answer, I needed a delimiter other than comma.
CREATE FUNCTION dbo.splitstring ( #stringToSplit nvarchar(MAX), #delim nvarchar(max))
RETURNS
#returnList TABLE ([value] [nvarchar] (MAX))
AS
BEGIN
DECLARE #value NVARCHAR(max)
DECLARE #pos INT
WHILE CHARINDEX(#delim, #stringToSplit) > 0
BEGIN
SELECT #pos = CHARINDEX(#delim, #stringToSplit)
SELECT #value = SUBSTRING(#stringToSplit, 1, #pos - 1)
INSERT INTO #returnList
SELECT #value
SELECT #stringToSplit = SUBSTRING(#stringToSplit, #pos + LEN(#delim), LEN(#stringToSplit) - #pos)
END
INSERT INTO #returnList
SELECT #stringToSplit
RETURN
END
GO
And to use it:
SELECT * FROM dbo.splitstring('test1 test2 test3', ' ');
(Tested on SQL Server 2008 R2)
EDIT: correct test code

ALTER FUNCTION [dbo].func_split_string
(
#input as varchar(max),
#delimiter as varchar(10) = ";"
)
RETURNS #result TABLE
(
id smallint identity(1,1),
csv_value varchar(max) not null
)
AS
BEGIN
DECLARE #pos AS INT;
DECLARE #string AS VARCHAR(MAX) = '';
WHILE LEN(#input) > 0
BEGIN
SELECT #pos = CHARINDEX(#delimiter,#input);
IF(#pos<=0)
select #pos = len(#input)
IF(#pos <> LEN(#input))
SELECT #string = SUBSTRING(#input, 1, #pos-1);
ELSE
SELECT #string = SUBSTRING(#input, 1, #pos);
INSERT INTO #result SELECT #string
SELECT #input = SUBSTRING(#input, #pos+len(#delimiter), LEN(#input)-#pos)
END
RETURN
END

You can Use this function:
CREATE FUNCTION SplitString
(
#Input NVARCHAR(MAX),
#Character CHAR(1)
)
RETURNS #Output TABLE (
Item NVARCHAR(1000)
)
AS
BEGIN
DECLARE #StartIndex INT, #EndIndex INT
SET #StartIndex = 1
IF SUBSTRING(#Input, LEN(#Input) - 1, LEN(#Input)) <> #Character
BEGIN
SET #Input = #Input + #Character
END
WHILE CHARINDEX(#Character, #Input) > 0
BEGIN
SET #EndIndex = CHARINDEX(#Character, #Input)
INSERT INTO #Output(Item)
SELECT SUBSTRING(#Input, #StartIndex, #EndIndex - 1)
SET #Input = SUBSTRING(#Input, #EndIndex + 1, LEN(#Input))
END
RETURN
END
GO

Here is an example that you can use as function or also you can put the same logic in procedure.
--SELECT * from [dbo].fn_SplitString ;
CREATE FUNCTION [dbo].[fn_SplitString]
(#CSV VARCHAR(MAX), #Delimeter VARCHAR(100) = ',')
RETURNS #retTable TABLE
(
[value] VARCHAR(MAX) NULL
)AS
BEGIN
DECLARE
#vCSV VARCHAR (MAX) = #CSV,
#vDelimeter VARCHAR (100) = #Delimeter;
IF #vDelimeter = ';'
BEGIN
SET #vCSV = REPLACE(#vCSV, ';', '~!~#~');
SET #vDelimeter = REPLACE(#vDelimeter, ';', '~!~#~');
END;
SET #vCSV = REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(#vCSV, '&', '&'), '<', '<'), '>', '>'), '''', '&apos;'), '"', '"');
DECLARE #xml XML;
SET #xml = '<i>' + REPLACE(#vCSV, #vDelimeter, '</i><i>') + '</i>';
INSERT INTO #retTable
SELECT
x.i.value('.', 'varchar(max)') AS COLUMNNAME
FROM #xml.nodes('//i')AS x(i);
RETURN;
END;

/*
Answer to T-SQL split string
Based on answers from Andy Robinson and AviG
Enhanced functionality ref: LEN function not including trailing spaces in SQL Server
This 'file' should be valid as both a markdown file and an SQL file
*/
CREATE FUNCTION dbo.splitstring ( --CREATE OR ALTER
#stringToSplit NVARCHAR(MAX)
) RETURNS #returnList TABLE ([Item] NVARCHAR (MAX))
AS BEGIN
DECLARE #name NVARCHAR(MAX)
DECLARE #pos BIGINT
SET #stringToSplit = #stringToSplit + ',' -- this should allow entries that end with a `,` to have a blank value in that "column"
WHILE ((LEN(#stringToSplit+'_') > 1)) BEGIN -- `+'_'` gets around LEN trimming terminal spaces. See URL referenced above
SET #pos = COALESCE(NULLIF(CHARINDEX(',', #stringToSplit),0),LEN(#stringToSplit+'_')) -- COALESCE grabs first non-null value
SET #name = SUBSTRING(#stringToSplit, 1, #pos-1) --MAX size of string of type nvarchar is 4000
SET #stringToSplit = SUBSTRING(#stringToSplit, #pos+1, 4000) -- With SUBSTRING fn (MS web): "If start is greater than the number of characters in the value expression, a zero-length expression is returned."
INSERT INTO #returnList SELECT #name --additional debugging parameters below can be added
-- + ' pos:' + CAST(#pos as nvarchar) + ' remain:''' + #stringToSplit + '''(' + CAST(LEN(#stringToSplit+'_')-1 as nvarchar) + ')'
END
RETURN
END
GO
/*
Test cases: see URL referenced as "enhanced functionality" above
SELECT *,LEN(Item+'_')-1 'L' from splitstring('a,,b')
Item | L
--- | ---
a | 1
| 0
b | 1
SELECT *,LEN(Item+'_')-1 'L' from splitstring('a,,')
Item | L
--- | ---
a | 1
| 0
| 0
SELECT *,LEN(Item+'_')-1 'L' from splitstring('a,, ')
Item | L
--- | ---
a | 1
| 0
| 1
SELECT *,LEN(Item+'_')-1 'L' from splitstring('a,, c ')
Item | L
--- | ---
a | 1
| 0
c | 3
*/

The easiest way:
Install SQL Server 2016
Use STRING_SPLIT https://msdn.microsoft.com/en-us/library/mt684588.aspx
It works even in express edition :).

SQL Split Function and Ordering Issue?

I have the following Split function,
ALTER FUNCTION [dbo].[Split](#String varchar(8000), #Delimiter char(1))
returns #temptable TABLE (items varchar(8000))
as
begin
set #String = RTRIM(LTRIM(#String))
declare #idx int
declare #slice varchar(8000)
select #idx = 1
if len(#String)<1 or #String is null return
while #idx!= 0
begin
set #idx = charindex(#Delimiter,#String)
if #idx!=0
set #slice = left(#String,#idx - 1)
else
set #slice = #String
if(len(#slice)>0)
insert into #temptable(Items) values(#slice)
set #String = right(#String,len(#String) - #idx)
if len(#String) = 0 break
end
return
end
When I write,
SELECT Items
FROM Split('around the home,clean and protect,soaps and air fresheners,air fresheners',',')
This will give me,
air fresheners
around the home
clean and protect
soaps and air fresheners
I need to maintain the order.

A simpler function:
CREATE FUNCTION dbo.SplitStrings_Ordered
(
#List nvarchar(MAX),
#Delimiter nvarchar(255)
)
RETURNS TABLE
AS
RETURN
(
SELECT [Index] = CHARINDEX(#Delimiter, #List + #Delimiter, Number),
Item = SUBSTRING(#List, Number, CHARINDEX(#Delimiter,
#List + #Delimiter, Number) - Number)
FROM
(
SELECT ROW_NUMBER() OVER (ORDER BY [object_id]) FROM sys.all_objects
) AS n(Number)
WHERE Number <= CONVERT(INT, LEN(#List))
AND SUBSTRING(#Delimiter + #List, Number, LEN(#Delimiter)) = #Delimiter
);
GO
Sample usage:
DECLARE #s nvarchar(MAX) = N',around the home,clean and protect,soaps and air'
+ ' fresheners,air fresheners';
SELECT Item FROM dbo.SplitStrings_Ordered(#s, N',') ORDER BY [Index];
Or to return orders from a table ordered by input:
SELECT o.OrderID
FROM dbo.Orders AS o
INNER JOIN dbo.SplitStrings_Ordered('123,789,456') AS f
ON o.OrderID = CONVERT(int, f.Item)
ORDER BY f.[Index];

Your function will need to set an order column (seq in this sample):
ALTER FUNCTION [dbo].[Split](#String varchar(8000), #Delimiter char(1))
returns #temptable TABLE (seq int, items varchar(8000))
as
begin
set #String = RTRIM(LTRIM(#String))
declare #idx int
declare #seq int
declare #slice varchar(8000)
set #seq=1
select #idx = 1
if len(#String)<1 or #String is null return
while #idx!= 0
begin
set #idx = charindex(#Delimiter,#String)
if #idx!=0
set #slice = left(#String,#idx - 1)
else
set #slice = #String
if(len(#slice)>0)
begin
set #seq = #seq + 1
insert into #temptable(seq, Items) values(#seq,#slice)
end
set #String = right(#String,len(#String) - #idx)
if len(#String) = 0 break
end
return
end
GO
SELECT * FROM Split('around the home,clean and protect,soaps and air fresheners,air fresheners',',') order by seq

declare #Version nvarchar(3000)
declare #Delimiter char(1) = ','
declare #result nvarchar(3000)
set #Version = 'Terça-feira, Quarta-feira, Sexta-feira, Segunda-feira';
with V as (select value v, Row_Number() over (order by (select 0)) n
from String_Split(#Version, #Delimiter)
)
SELECT #result = STUFF((SELECT ', ' + RTRIM(LTRIM(v))
FROM V
ORDER BY CASE RTRIM(LTRIM(v))
WHEN 'Segunda-feira' then 1
WHEN 'Terça-feira' then 2
WHEN 'Quarta-feira' then 3
WHEN 'Quinta-feira' then 4
WHEN 'Sexta-feira' then 5
END FOR XML PATH('')), 1, LEN(#Delimiter), '')
PRINT #result

This will be a much faster solution when your string has 1000 or more values to split. For table-valued functions, to have any ordering, you must apply "ORDER BY" at the place of use. This is because "SELECT" from a table without "ORDER BY" is by convention not having any sorting.
CREATE FUNCTION [dbo].[Split]
(
#String VARCHAR(max),
#Delimiter VARCHAR(max)
)
RETURNS #Data TABLE
(
[Order] INT IDENTITY(1,1),
[Value] VARCHAR(max)
)
AS
BEGIN
DECLARE #x XML = cast('<i>' + replace(#String, #Delimiter, '</i><i>') + '</i>' AS XML)
INSERT INTO #Data
SELECT v.value('.', 'varchar(max)') FROM #x.nodes('i') AS x(v)
RETURN
END
GO

If you can abide compatibility level 130 of SQL Server, you can use the String_Split() function.
With this and the Row_Number() function, you can return a table that includes the original sequence. For example:
declare #Version nvarchar(128)
set #Version = '1.2.3';
with V as (select value v, Row_Number() over (order by (select 0)) n
from String_Split(#Version, '.')
)
select
(select v from V where n = 1) Major,
(select v from V where n = 2) Minor,
(select v from V where n = 3) Revision
Note that Row_Number requires an ordering, but if you pass a literal value the results are in the parsed sequence. This isn't guaranteed to be the case with future SQL Server version, as according to the String_Split documentation, there is no official ordering. I doubt Microsoft will break this, at least before introducing a version of the function that returns the order as it should, but in the mean time you best not depend on this ordering when writing code that decides whether or not to launch the missile.
Returns:
Major Minor Revision
----- ----- --------
1 2 3

T-SQL split string

I have a SQL Server 2008 R2 column containing a string which I need to split by a comma. I have seen many answers on StackOverflow but none of them works in R2. I have made sure I have select permissions on any split function examples. Any help greatly appreciated.

I've used this SQL before which may work for you:-
CREATE FUNCTION dbo.splitstring ( #stringToSplit VARCHAR(MAX) )
RETURNS
#returnList TABLE ([Name] [nvarchar] (500))
AS
BEGIN
DECLARE #name NVARCHAR(255)
DECLARE #pos INT
WHILE CHARINDEX(',', #stringToSplit) > 0
BEGIN
SELECT #pos = CHARINDEX(',', #stringToSplit)
SELECT #name = SUBSTRING(#stringToSplit, 1, #pos-1)
INSERT INTO #returnList
SELECT #name
SELECT #stringToSplit = SUBSTRING(#stringToSplit, #pos+1, LEN(#stringToSplit)-#pos)
END
INSERT INTO #returnList
SELECT #stringToSplit
RETURN
END
and to use it:-
SELECT * FROM dbo.splitstring('91,12,65,78,56,789')

Instead of recursive CTEs and while loops, has anyone considered a more set-based approach? Note that this function was written for the question, which was based on SQL Server 2008 and comma as the delimiter. In SQL Server 2016 and above (and in compatibility level 130 and above), STRING_SPLIT() is a better option.
CREATE FUNCTION dbo.SplitString
(
#List nvarchar(max),
#Delim nvarchar(255)
)
RETURNS TABLE
AS
RETURN ( SELECT [Value] FROM
(
SELECT [Value] = LTRIM(RTRIM(SUBSTRING(#List, [Number],
CHARINDEX(#Delim, #List + #Delim, [Number]) - [Number])))
FROM (SELECT Number = ROW_NUMBER() OVER (ORDER BY name)
FROM sys.all_columns) AS x WHERE Number <= LEN(#List)
AND SUBSTRING(#Delim + #List, [Number], DATALENGTH(#Delim)/2) = #Delim
) AS y
);
GO
If you want to avoid the limitation of the length of the string being <= the number of rows in sys.all_columns (9,980 in model in SQL Server 2017; much higher in your own user databases), you can use other approaches for deriving the numbers, such as building your own table of numbers. You could also use a recursive CTE in cases where you can't use system tables or create your own:
CREATE FUNCTION dbo.SplitString
(
#List nvarchar(max),
#Delim nvarchar(255)
)
RETURNS TABLE WITH SCHEMABINDING
AS
RETURN ( WITH n(n) AS (SELECT 1 UNION ALL SELECT n+1
FROM n WHERE n <= LEN(#List))
SELECT [Value] = SUBSTRING(#List, n,
CHARINDEX(#Delim, #List + #Delim, n) - n)
FROM n WHERE n <= LEN(#List)
AND SUBSTRING(#Delim + #List, n, DATALENGTH(#Delim)/2) = #Delim
);
GO
But you'll have to append OPTION (MAXRECURSION 0) (or MAXRECURSION <longest possible string length if < 32768>) to the outer query in order to avoid errors with recursion for strings > 100 characters. If that is also not a good alternative then see this answer as pointed out in the comments, or this answer if you need an ordered split string function.
(Also, the delimiter will have to be NCHAR(<=1228). Still researching why.)
More on split functions, why (and proof that) while loops and recursive CTEs don't scale, and better alternatives, if you're splitting strings coming from the application layer:
Splitting strings

Finally the wait is over in SQL Server 2016 they have introduced Split string function : STRING_SPLIT
select * From STRING_SPLIT ('a,b', ',') cs
All the other methods to split string like XML, Tally table, while loop, etc.. has been blown away by this STRING_SPLIT function.
Here is an excellent article with performance comparison : Performance Surprises and Assumptions : STRING_SPLIT

The easiest way to do this is by using XML format.
1. Converting string to rows without table
QUERY
DECLARE #String varchar(100) = 'String1,String2,String3'
-- To change ',' to any other delimeter, just change ',' to your desired one
DECLARE #Delimiter CHAR = ','
SELECT LTRIM(RTRIM(Split.a.value('.', 'VARCHAR(100)'))) 'Value'
FROM
(
SELECT CAST ('<M>' + REPLACE(#String, #Delimiter, '</M><M>') + '</M>' AS XML) AS Data
) AS A
CROSS APPLY Data.nodes ('/M') AS Split(a)
RESULT
x---------x
| Value |
x---------x
| String1 |
| String2 |
| String3 |
x---------x
2. Converting to rows from a table which have an ID for each CSV row
SOURCE TABLE
x-----x--------------------------x
| Id | Value |
x-----x--------------------------x
| 1 | String1,String2,String3 |
| 2 | String4,String5,String6 |
x-----x--------------------------x
QUERY
-- To change ',' to any other delimeter, just change ',' before '</M><M>' to your desired one
DECLARE #Delimiter CHAR = ','
SELECT ID,LTRIM(RTRIM(Split.a.value('.', 'VARCHAR(100)'))) 'Value'
FROM
(
SELECT ID,CAST ('<M>' + REPLACE(VALUE, #Delimiter, '</M><M>') + '</M>' AS XML) AS Data
FROM TABLENAME
) AS A
CROSS APPLY Data.nodes ('/M') AS Split(a)
RESULT
x-----x----------x
| Id | Value |
x-----x----------x
| 1 | String1 |
| 1 | String2 |
| 1 | String3 |
| 2 | String4 |
| 2 | String5 |
| 2 | String6 |
x-----x----------x

I needed a quick way to get rid of the +4 from a zip code.
UPDATE #Emails
SET ZIPCode = SUBSTRING(ZIPCode, 1, (CHARINDEX('-', ZIPCODE)-1))
WHERE ZIPCode LIKE '%-%'
No proc... no UDF... just one tight little inline command that does what it must. Not fancy, not elegant.
Change the delimiter as needed, etc, and it will work for anything.

if you replace
WHILE CHARINDEX(',', #stringToSplit) > 0
with
WHILE LEN(#stringToSplit) > 0
you can eliminate that last insert after the while loop!
CREATE FUNCTION dbo.splitstring ( #stringToSplit VARCHAR(MAX) )
RETURNS
#returnList TABLE ([Name] [nvarchar] (500))
AS
BEGIN
DECLARE #name NVARCHAR(255)
DECLARE #pos INT
WHILE LEN(#stringToSplit) > 0
BEGIN
SELECT #pos = CHARINDEX(',', #stringToSplit)
if #pos = 0
SELECT #pos = LEN(#stringToSplit)
SELECT #name = SUBSTRING(#stringToSplit, 1, #pos-1)
INSERT INTO #returnList
SELECT #name
SELECT #stringToSplit = SUBSTRING(#stringToSplit, #pos+1, LEN(#stringToSplit)-#pos)
END
RETURN
END

The often used approach with XML elements breaks in case of forbidden characters. This is an approach to use this method with any kind of character, even with the semicolon as delimiter.
The trick is, first to use SELECT SomeString AS [*] FOR XML PATH('') to get all forbidden characters properly escaped. That's the reason, why I replace the delimiter to a magic value to avoid troubles with ; as delimiter.
DECLARE #Dummy TABLE (ID INT, SomeTextToSplit NVARCHAR(MAX))
INSERT INTO #Dummy VALUES
(1,N'A&B;C;D;E, F')
,(2,N'"C" & ''D'';<C>;D;E, F');
DECLARE #Delimiter NVARCHAR(10)=';'; --special effort needed (due to entities coding with "&code;")!
WITH Casted AS
(
SELECT *
,CAST(N'<x>' + REPLACE((SELECT REPLACE(SomeTextToSplit,#Delimiter,N'§§Split$me$here§§') AS [*] FOR XML PATH('')),N'§§Split$me$here§§',N'</x><x>') + N'</x>' AS XML) AS SplitMe
FROM #Dummy
)
SELECT Casted.ID
,x.value(N'.',N'nvarchar(max)') AS Part
FROM Casted
CROSS APPLY SplitMe.nodes(N'/x') AS A(x)
The result
ID Part
1 A&B
1 C
1 D
1 E, F
2 "C" & 'D'
2 <C>
2 D
2 E, F

All the functions for string splitting that use some kind of Loop-ing (iterations) have bad performance. They should be replaced with set-based solution.
This code executes excellent.
CREATE FUNCTION dbo.SplitStrings
(
#List NVARCHAR(MAX),
#Delimiter NVARCHAR(255)
)
RETURNS TABLE
WITH SCHEMABINDING
AS
RETURN
(
SELECT Item = y.i.value('(./text())[1]', 'nvarchar(4000)')
FROM
(
SELECT x = CONVERT(XML, '<i>'
+ REPLACE(#List, #Delimiter, '</i><i>')
+ '</i>').query('.')
) AS a CROSS APPLY x.nodes('i') AS y(i)
);
GO

I had to write something like this recently. Here's the solution I came up with. It's generalized for any delimiter string and I think it would perform slightly better:
CREATE FUNCTION [dbo].[SplitString]
( #string nvarchar(4000)
, #delim nvarchar(100) )
RETURNS
#result TABLE
( [Value] nvarchar(4000) NOT NULL
, [Index] int NOT NULL )
AS
BEGIN
DECLARE #str nvarchar(4000)
, #pos int
, #prv int = 1
SELECT #pos = CHARINDEX(#delim, #string)
WHILE #pos > 0
BEGIN
SELECT #str = SUBSTRING(#string, #prv, #pos - #prv)
INSERT INTO #result SELECT #str, #prv
SELECT #prv = #pos + LEN(#delim)
, #pos = CHARINDEX(#delim, #string, #pos + 1)
END
INSERT INTO #result SELECT SUBSTRING(#string, #prv, 4000), #prv
RETURN
END

If you need a quick ad-hoc solution for common cases with minimum code, then this recursive CTE two-liner will do it:
DECLARE #s VARCHAR(200) = ',1,2,,3,,,4,,,,5,'
;WITH
a AS (SELECT i=-1, j=0 UNION ALL SELECT j, CHARINDEX(',', #s, j + 1) FROM a WHERE j > i),
b AS (SELECT SUBSTRING(#s, i+1, IIF(j>0, j, LEN(#s)+1)-i-1) s FROM a WHERE i >= 0)
SELECT * FROM b
Either use this as a stand-alone statement or just add the above CTEs to any of your queries and you will be able to join the resulting table b with others for use in any further expressions.
edit (by Shnugo)
If you add a counter, you will get a position index together with the List:
DECLARE #s VARCHAR(200) = '1,2333,344,4'
;WITH
a AS (SELECT n=0, i=-1, j=0 UNION ALL SELECT n+1, j, CHARINDEX(',', #s, j+1) FROM a WHERE j > i),
b AS (SELECT n, SUBSTRING(#s, i+1, IIF(j>0, j, LEN(#s)+1)-i-1) s FROM a WHERE i >= 0)
SELECT * FROM b;
The result:
n s
1 1
2 2333
3 344
4 4

I take the xml route by wrapping the values into elements (M but anything works):
declare #v nvarchar(max) = '100,201,abcde'
select
a.value('.', 'varchar(max)')
from
(select cast('<M>' + REPLACE(#v, ',', '</M><M>') + '</M>' AS XML) as col) as A
CROSS APPLY A.col.nodes ('/M') AS Split(a)

A solution using a CTE, if anyone should need that (apart from me, who obviously did, that is why I wrote it).
declare #StringToSplit varchar(100) = 'Test1,Test2,Test3';
declare #SplitChar varchar(10) = ',';
with StringToSplit as (
select
ltrim( rtrim( substring( #StringToSplit, 1, charindex( #SplitChar, #StringToSplit ) - 1 ) ) ) Head
, substring( #StringToSplit, charindex( #SplitChar, #StringToSplit ) + 1, len( #StringToSplit ) ) Tail
union all
select
ltrim( rtrim( substring( Tail, 1, charindex( #SplitChar, Tail ) - 1 ) ) ) Head
, substring( Tail, charindex( #SplitChar, Tail ) + 1, len( Tail ) ) Tail
from StringToSplit
where charindex( #SplitChar, Tail ) > 0
union all
select
ltrim( rtrim( Tail ) ) Head
, '' Tail
from StringToSplit
where charindex( #SplitChar, Tail ) = 0
and len( Tail ) > 0
)
select Head from StringToSplit

This is more narrowly-tailored. When I do this I usually have a comma-delimited list of unique ids (INT or BIGINT), which I want to cast as a table to use as an inner join to another table that has a primary key of INT or BIGINT. I want an in-line table-valued function returned so that I have the most efficient join possible.
Sample usage would be:
DECLARE #IDs VARCHAR(1000);
SET #IDs = ',99,206,124,8967,1,7,3,45234,2,889,987979,';
SELECT me.Value
FROM dbo.MyEnum me
INNER JOIN dbo.GetIntIdsTableFromDelimitedString(#IDs) ids ON me.PrimaryKey = ids.ID
I stole the idea from http://sqlrecords.blogspot.com/2012/11/converting-delimited-list-to-table.html, changing it to be in-line table-valued and cast as INT.
create function dbo.GetIntIDTableFromDelimitedString
(
#IDs VARCHAR(1000) --this parameter must start and end with a comma, eg ',123,456,'
--all items in list must be perfectly formatted or function will error
)
RETURNS TABLE AS
RETURN
SELECT
CAST(SUBSTRING(#IDs,Nums.number + 1,CHARINDEX(',',#IDs,(Nums.number+2)) - Nums.number - 1) AS INT) AS ID
FROM
[master].[dbo].[spt_values] Nums
WHERE Nums.Type = 'P'
AND Nums.number BETWEEN 1 AND DATALENGTH(#IDs)
AND SUBSTRING(#IDs,Nums.number,1) = ','
AND CHARINDEX(',',#IDs,(Nums.number+1)) > Nums.number;
GO

There is a correct version on here but I thought it would be nice to add a little fault tolerance in case they have a trailing comma as well as make it so you could use it not as a function but as part of a larger piece of code. Just in case you're only using it once time and don't need a function. This is also for integers (which is what I needed it for) so you might have to change your data types.
DECLARE #StringToSeperate VARCHAR(10)
SET #StringToSeperate = '1,2,5'
--SELECT #StringToSeperate IDs INTO #Test
DROP TABLE #IDs
CREATE TABLE #IDs (ID int)
DECLARE #CommaSeperatedValue NVARCHAR(255) = ''
DECLARE #Position INT = LEN(#StringToSeperate)
--Add Each Value
WHILE CHARINDEX(',', #StringToSeperate) > 0
BEGIN
SELECT #Position = CHARINDEX(',', #StringToSeperate)
SELECT #CommaSeperatedValue = SUBSTRING(#StringToSeperate, 1, #Position-1)
INSERT INTO #IDs
SELECT #CommaSeperatedValue
SELECT #StringToSeperate = SUBSTRING(#StringToSeperate, #Position+1, LEN(#StringToSeperate)-#Position)
END
--Add Last Value
IF (LEN(LTRIM(RTRIM(#StringToSeperate)))>0)
BEGIN
INSERT INTO #IDs
SELECT SUBSTRING(#StringToSeperate, 1, #Position)
END
SELECT * FROM #IDs

I modified +Andy Robinson's function a little bit. Now you can select only required part from returning table:
CREATE FUNCTION dbo.splitstring ( #stringToSplit VARCHAR(MAX) )
RETURNS
#returnList TABLE ([numOrder] [tinyint] , [Name] [nvarchar] (500)) AS
BEGIN
DECLARE #name NVARCHAR(255)
DECLARE #pos INT
DECLARE #orderNum INT
SET #orderNum=0
WHILE CHARINDEX('.', #stringToSplit) > 0
BEGIN
SELECT #orderNum=#orderNum+1;
SELECT #pos = CHARINDEX('.', #stringToSplit)
SELECT #name = SUBSTRING(#stringToSplit, 1, #pos-1)
INSERT INTO #returnList
SELECT #orderNum,#name
SELECT #stringToSplit = SUBSTRING(#stringToSplit, #pos+1, LEN(#stringToSplit)-#pos)
END
SELECT #orderNum=#orderNum+1;
INSERT INTO #returnList
SELECT #orderNum, #stringToSplit
RETURN
END
Usage:
SELECT Name FROM dbo.splitstring('ELIS.YD.CRP1.1.CBA.MDSP.T389.BT') WHERE numOrder=5

Simples
DECLARE #String varchar(100) = '11,21,84,85,87'
SELECT * FROM TB_PAPEL WHERE CD_PAPEL IN (SELECT value FROM STRING_SPLIT(#String, ','))
-- EQUIVALENTE
SELECT * FROM TB_PAPEL WHERE CD_PAPEL IN (11,21,84,85,87)

here is a version that can split on a pattern using patindex, a simple adaptation of the post above. I had a case where I needed to split a string that contained multiple separator chars.
alter FUNCTION dbo.splitstring ( #stringToSplit VARCHAR(1000), #splitPattern varchar(10) )
RETURNS
#returnList TABLE ([Name] [nvarchar] (500))
AS
BEGIN
DECLARE #name NVARCHAR(255)
DECLARE #pos INT
WHILE PATINDEX(#splitPattern, #stringToSplit) > 0
BEGIN
SELECT #pos = PATINDEX(#splitPattern, #stringToSplit)
SELECT #name = SUBSTRING(#stringToSplit, 1, #pos-1)
INSERT INTO #returnList
SELECT #name
SELECT #stringToSplit = SUBSTRING(#stringToSplit, #pos+1, LEN(#stringToSplit)-#pos)
END
INSERT INTO #returnList
SELECT #stringToSplit
RETURN
END
select * from dbo.splitstring('stringa/stringb/x,y,z','%[/,]%');
result looks like this
stringa
stringb
x
y
z

Personnaly I use this function :
ALTER FUNCTION [dbo].[CUST_SplitString]
(
#String NVARCHAR(4000),
#Delimiter NCHAR(1)
)
RETURNS TABLE
AS
RETURN
(
WITH Split(stpos,endpos)
AS(
SELECT 0 AS stpos, CHARINDEX(#Delimiter,#String) AS endpos
UNION ALL
SELECT endpos+1, CHARINDEX(#Delimiter,#String,endpos+1)
FROM Split
WHERE endpos > 0
)
SELECT 'Id' = ROW_NUMBER() OVER (ORDER BY (SELECT 1)),
'Data' = SUBSTRING(#String,stpos,COALESCE(NULLIF(endpos,0),LEN(#String)+1)-stpos)
FROM Split
)

I have developed a double Splitter (Takes two split characters) as requested Here. Could be of some value in this thread seeing its the most referenced for queries relating to string splitting.
CREATE FUNCTION uft_DoubleSplitter
(
-- Add the parameters for the function here
#String VARCHAR(4000),
#Splitter1 CHAR,
#Splitter2 CHAR
)
RETURNS #Result TABLE (Id INT,MId INT,SValue VARCHAR(4000))
AS
BEGIN
DECLARE #FResult TABLE(Id INT IDENTITY(1, 1),
SValue VARCHAR(4000))
DECLARE #SResult TABLE(Id INT IDENTITY(1, 1),
MId INT,
SValue VARCHAR(4000))
SET #String = #String+#Splitter1
WHILE CHARINDEX(#Splitter1, #String) > 0
BEGIN
DECLARE #WorkingString VARCHAR(4000) = NULL
SET #WorkingString = SUBSTRING(#String, 1, CHARINDEX(#Splitter1, #String) - 1)
--Print #workingString
INSERT INTO #FResult
SELECT CASE
WHEN #WorkingString = '' THEN NULL
ELSE #WorkingString
END
SET #String = SUBSTRING(#String, LEN(#WorkingString) + 2, LEN(#String))
END
IF ISNULL(#Splitter2, '') != ''
BEGIN
DECLARE #OStartLoop INT
DECLARE #OEndLoop INT
SELECT #OStartLoop = MIN(Id),
#OEndLoop = MAX(Id)
FROM #FResult
WHILE #OStartLoop <= #OEndLoop
BEGIN
DECLARE #iString VARCHAR(4000)
DECLARE #iMId INT
SELECT #iString = SValue+#Splitter2,
#iMId = Id
FROM #FResult
WHERE Id = #OStartLoop
WHILE CHARINDEX(#Splitter2, #iString) > 0
BEGIN
DECLARE #iWorkingString VARCHAR(4000) = NULL
SET #IWorkingString = SUBSTRING(#iString, 1, CHARINDEX(#Splitter2, #iString) - 1)
INSERT INTO #SResult
SELECT #iMId,
CASE
WHEN #iWorkingString = '' THEN NULL
ELSE #iWorkingString
END
SET #iString = SUBSTRING(#iString, LEN(#iWorkingString) + 2, LEN(#iString))
END
SET #OStartLoop = #OStartLoop + 1
END
INSERT INTO #Result
SELECT MId AS PrimarySplitID,
ROW_NUMBER() OVER (PARTITION BY MId ORDER BY Mid, Id) AS SecondarySplitID ,
SValue
FROM #SResult
END
ELSE
BEGIN
INSERT INTO #Result
SELECT Id AS PrimarySplitID,
NULL AS SecondarySplitID,
SValue
FROM #FResult
END
RETURN
Usage:
--FirstSplit
SELECT * FROM uft_DoubleSplitter('ValueA=ValueB=ValueC=ValueD==ValueE&ValueA=ValueB=ValueC===ValueE&ValueA=ValueB==ValueD===','&',NULL)
--Second Split
SELECT * FROM uft_DoubleSplitter('ValueA=ValueB=ValueC=ValueD==ValueE&ValueA=ValueB=ValueC===ValueE&ValueA=ValueB==ValueD===','&','=')
Possible Usage (Get second value of each split):
SELECT fn.SValue
FROM uft_DoubleSplitter('ValueA=ValueB=ValueC=ValueD==ValueE&ValueA=ValueB=ValueC===ValueE&ValueA=ValueB==ValueD===', '&', '=')AS fn
WHERE fn.mid = 2

A recursive cte based solution
declare #T table (iden int identity, col1 varchar(100));
insert into #T(col1) values
('ROOT/South America/Lima/Test/Test2')
, ('ROOT/South America/Peru/Test/Test2')
, ('ROOT//South America/Venuzuala ')
, ('RtT/South America / ')
, ('ROOT/South Americas// ');
declare #split char(1) = '/';
select #split as split;
with cte as
( select t.iden, case when SUBSTRING(REVERSE(rtrim(t.col1)), 1, 1) = #split then LTRIM(RTRIM(t.col1)) else LTRIM(RTRIM(t.col1)) + #split end as col1, 0 as pos , 1 as cnt
from #T t
union all
select t.iden, t.col1 , charindex(#split, t.col1, t.pos + 1), cnt + 1
from cte t
where charindex(#split, t.col1, t.pos + 1) > 0
)
select t1.*, t2.pos, t2.cnt
, ltrim(rtrim(SUBSTRING(t1.col1, t1.pos+1, t2.pos-t1.pos-1))) as bingo
from cte t1
join cte t2
on t2.iden = t1.iden
and t2.cnt = t1.cnt+1
and t2.pos > t1.pos
order by t1.iden, t1.cnt;

With all due respect to #AviG this is the bug free version of function deviced by him to return all the tokens in full.
IF EXISTS (SELECT * FROM sys.objects WHERE type = 'TF' AND name = 'TF_SplitString')
DROP FUNCTION [dbo].[TF_SplitString]
GO
-- =============================================
-- Author: AviG
-- Amendments: Parameterize the delimeter and included the missing chars in last token - Gemunu Wickremasinghe
-- Description: Tabel valued function that Breaks the delimeted string by given delimeter and returns a tabel having split results
-- Usage
-- select * from [dbo].[TF_SplitString]('token1,token2,,,,,,,,token969',',')
-- 969 items should be returned
-- select * from [dbo].[TF_SplitString]('4672978261,4672978255',',')
-- 2 items should be returned
-- =============================================
CREATE FUNCTION dbo.TF_SplitString
( #stringToSplit VARCHAR(MAX) ,
#delimeter char = ','
)
RETURNS
#returnList TABLE ([Name] [nvarchar] (500))
AS
BEGIN
DECLARE #name NVARCHAR(255)
DECLARE #pos INT
WHILE LEN(#stringToSplit) > 0
BEGIN
SELECT #pos = CHARINDEX(#delimeter, #stringToSplit)
if #pos = 0
BEGIN
SELECT #pos = LEN(#stringToSplit)
SELECT #name = SUBSTRING(#stringToSplit, 1, #pos)
END
else
BEGIN
SELECT #name = SUBSTRING(#stringToSplit, 1, #pos-1)
END
INSERT INTO #returnList
SELECT #name
SELECT #stringToSplit = SUBSTRING(#stringToSplit, #pos+1, LEN(#stringToSplit)-#pos)
END
RETURN
END

This is based on Andy Robertson's answer, I needed a delimiter other than comma.
CREATE FUNCTION dbo.splitstring ( #stringToSplit nvarchar(MAX), #delim nvarchar(max))
RETURNS
#returnList TABLE ([value] [nvarchar] (MAX))
AS
BEGIN
DECLARE #value NVARCHAR(max)
DECLARE #pos INT
WHILE CHARINDEX(#delim, #stringToSplit) > 0
BEGIN
SELECT #pos = CHARINDEX(#delim, #stringToSplit)
SELECT #value = SUBSTRING(#stringToSplit, 1, #pos - 1)
INSERT INTO #returnList
SELECT #value
SELECT #stringToSplit = SUBSTRING(#stringToSplit, #pos + LEN(#delim), LEN(#stringToSplit) - #pos)
END
INSERT INTO #returnList
SELECT #stringToSplit
RETURN
END
GO
And to use it:
SELECT * FROM dbo.splitstring('test1 test2 test3', ' ');
(Tested on SQL Server 2008 R2)
EDIT: correct test code

ALTER FUNCTION [dbo].func_split_string
(
#input as varchar(max),
#delimiter as varchar(10) = ";"
)
RETURNS #result TABLE
(
id smallint identity(1,1),
csv_value varchar(max) not null
)
AS
BEGIN
DECLARE #pos AS INT;
DECLARE #string AS VARCHAR(MAX) = '';
WHILE LEN(#input) > 0
BEGIN
SELECT #pos = CHARINDEX(#delimiter,#input);
IF(#pos<=0)
select #pos = len(#input)
IF(#pos <> LEN(#input))
SELECT #string = SUBSTRING(#input, 1, #pos-1);
ELSE
SELECT #string = SUBSTRING(#input, 1, #pos);
INSERT INTO #result SELECT #string
SELECT #input = SUBSTRING(#input, #pos+len(#delimiter), LEN(#input)-#pos)
END
RETURN
END

You can Use this function:
CREATE FUNCTION SplitString
(
#Input NVARCHAR(MAX),
#Character CHAR(1)
)
RETURNS #Output TABLE (
Item NVARCHAR(1000)
)
AS
BEGIN
DECLARE #StartIndex INT, #EndIndex INT
SET #StartIndex = 1
IF SUBSTRING(#Input, LEN(#Input) - 1, LEN(#Input)) <> #Character
BEGIN
SET #Input = #Input + #Character
END
WHILE CHARINDEX(#Character, #Input) > 0
BEGIN
SET #EndIndex = CHARINDEX(#Character, #Input)
INSERT INTO #Output(Item)
SELECT SUBSTRING(#Input, #StartIndex, #EndIndex - 1)
SET #Input = SUBSTRING(#Input, #EndIndex + 1, LEN(#Input))
END
RETURN
END
GO

Here is an example that you can use as function or also you can put the same logic in procedure.
--SELECT * from [dbo].fn_SplitString ;
CREATE FUNCTION [dbo].[fn_SplitString]
(#CSV VARCHAR(MAX), #Delimeter VARCHAR(100) = ',')
RETURNS #retTable TABLE
(
[value] VARCHAR(MAX) NULL
)AS
BEGIN
DECLARE
#vCSV VARCHAR (MAX) = #CSV,
#vDelimeter VARCHAR (100) = #Delimeter;
IF #vDelimeter = ';'
BEGIN
SET #vCSV = REPLACE(#vCSV, ';', '~!~#~');
SET #vDelimeter = REPLACE(#vDelimeter, ';', '~!~#~');
END;
SET #vCSV = REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(#vCSV, '&', '&'), '<', '<'), '>', '>'), '''', '&apos;'), '"', '"');
DECLARE #xml XML;
SET #xml = '<i>' + REPLACE(#vCSV, #vDelimeter, '</i><i>') + '</i>';
INSERT INTO #retTable
SELECT
x.i.value('.', 'varchar(max)') AS COLUMNNAME
FROM #xml.nodes('//i')AS x(i);
RETURN;
END;

/*
Answer to T-SQL split string
Based on answers from Andy Robinson and AviG
Enhanced functionality ref: LEN function not including trailing spaces in SQL Server
This 'file' should be valid as both a markdown file and an SQL file
*/
CREATE FUNCTION dbo.splitstring ( --CREATE OR ALTER
#stringToSplit NVARCHAR(MAX)
) RETURNS #returnList TABLE ([Item] NVARCHAR (MAX))
AS BEGIN
DECLARE #name NVARCHAR(MAX)
DECLARE #pos BIGINT
SET #stringToSplit = #stringToSplit + ',' -- this should allow entries that end with a `,` to have a blank value in that "column"
WHILE ((LEN(#stringToSplit+'_') > 1)) BEGIN -- `+'_'` gets around LEN trimming terminal spaces. See URL referenced above
SET #pos = COALESCE(NULLIF(CHARINDEX(',', #stringToSplit),0),LEN(#stringToSplit+'_')) -- COALESCE grabs first non-null value
SET #name = SUBSTRING(#stringToSplit, 1, #pos-1) --MAX size of string of type nvarchar is 4000
SET #stringToSplit = SUBSTRING(#stringToSplit, #pos+1, 4000) -- With SUBSTRING fn (MS web): "If start is greater than the number of characters in the value expression, a zero-length expression is returned."
INSERT INTO #returnList SELECT #name --additional debugging parameters below can be added
-- + ' pos:' + CAST(#pos as nvarchar) + ' remain:''' + #stringToSplit + '''(' + CAST(LEN(#stringToSplit+'_')-1 as nvarchar) + ')'
END
RETURN
END
GO
/*
Test cases: see URL referenced as "enhanced functionality" above
SELECT *,LEN(Item+'_')-1 'L' from splitstring('a,,b')
Item | L
--- | ---
a | 1
| 0
b | 1
SELECT *,LEN(Item+'_')-1 'L' from splitstring('a,,')
Item | L
--- | ---
a | 1
| 0
| 0
SELECT *,LEN(Item+'_')-1 'L' from splitstring('a,, ')
Item | L
--- | ---
a | 1
| 0
| 1
SELECT *,LEN(Item+'_')-1 'L' from splitstring('a,, c ')
Item | L
--- | ---
a | 1
| 0
c | 3
*/

The easiest way:
Install SQL Server 2016
Use STRING_SPLIT https://msdn.microsoft.com/en-us/library/mt684588.aspx
It works even in express edition :).

SQL - using a variable for an IN clause

I wish to do something like the following:
declare #FrameNumber nvarchar(20)
set #FrameNumber = '(p1, p2)'
select from myTable where c1 in #FrameNumber
What is the correct syntax for this?
(for note: I need to pass the value of #FrameNumber in as a parameter to the stored procedure... so I have to at least use the string "p1, p2")
would prefure and answer that was SQL 7 compatible, but SQL 2005 would be sufficient.

DECLARE #FrameNumbers TABLE (code NVARCHAR(20) PRIMARY KEY)
INSERT
INTO #framenumbers
VALUES ('p1')
INSERT
INTO #framenumbers
VALUES ('p2')
SELECT *
FROM mytable
WHERE c1 IN
(
SELECT code
FROM #framenumbers
)

CREATE FUNCTION [dbo].[func_ParseStringToTable] (#stringIN varchar(2000))
RETURNS #tOUT TABLE(RoomID int) AS
BEGIN
DECLARE #pos int
SET #pos=CHARINDEX(',',#StringIN)
WHILE #pos>0
BEGIN
INSERT #tOUT(RoomID) SELECT LEFT(#StringIN,CHARINDEX(',',#StringIN)-1)
SET #stringIN = SUBSTRING(#StringIN,CHARINDEX(',',#StringIN)+1,LEN(#StringIN))
SET #pos=CHARINDEX(',',#StringIN)
END
IF LEN(#StringIN)>0
BEGIN
INSERT #tOUT(RoomID) SELECT #StringIN
END
RETURN
END
usage...
SELECT * FROM table WHERE id IN (func_ParseStringToTable(#ids))

You could put load those values into a table variable, or you could use dynamic sql. Here are examples of each:
TABLE VARIABLE
DECLARE #FrameNumbers TABLE (
Frame NVARCHAR(20)
)
INSERT INTO #FrameNumbers (
Frame
)
SELECT 'p1'
UNION ALL SELECT 'p2'
option 1:
SELECT * FROM myTable WHERE c1 in (
SELECT Frame
FROM #FrameNumbers
)
option 2:
SELECT
m.*
FROM myTable m
INNER JOIN #FrameNumbers f ON f.Frame = m.c1
All that is fine, but this is my favorite:
DYNAMIC SQL
DECLARE
#FrameNumber nvarchar(20),
#sql nvarchar(max),
#ParamDef nvarchar(1000)
SET #FrameNumber = '(p1, p2)'
SET #sql = N'SELECT FROM myTable WHERE c1 IN ' + #FrameNumber
EXECUTE dbo.sp_ExecuteSQL #sql

I have another solution to do with split function,
DECLARE #FrameNumber NVARCHAR(20)
SET #FrameNumber = 'p1,p2'
SELECT * FROM MyTable WHERE ProductCode IN
(SELECT Value FROM fn_Split(#FrameNumber, ','))
OutPut:
Split Functions:
CREATE FUNCTION fn_Split (
#String VARCHAR(8000)
,#Delimiter CHAR(1)
)
RETURNS #temptable TABLE (Value VARCHAR(8000))
AS
BEGIN
DECLARE #idx INT
DECLARE #slice VARCHAR(8000)
SELECT #idx = 1
IF len(#String) < 1
OR #String IS NULL
RETURN
WHILE #idx != 0
BEGIN
SET #idx = charindex(#Delimiter, #String)
IF #idx != 0
SET #slice = left(#String, #idx - 1)
ELSE
SET #slice = #String
IF (len(#slice) > 0)
INSERT INTO #temptable (Value)
VALUES (#slice)
SET #String = right(#String, len(#String) - #idx)
IF len(#String) = 0
BREAK
END
RETURN
END

what version of SQL Server ?
If you are in 2008 you might be able to use table datatypes. Simplifies these things a lot.

If you are using Sql Server 2005+ have a look at this
--Split
DECLARE #textXML XML
DECLARE #data NVARCHAR(MAX),
#delimiter NVARCHAR(5)
SELECT #data = 'A,B,C',
#delimiter = ','
SELECT #textXML = CAST('<d>' + REPLACE(#data, #delimiter, '</d><d>') + '</d>' AS XML)
SELECT T.split.value('.', 'nvarchar(max)') AS data
FROM #textXML.nodes('/d') T(split)
You can you that as your in table to select from.
Have a look at XML Support in Microsoft SQL Server 2005

final solution:
DECLARE #FrameNumbers TABLE (FrameNumber NVARCHAR(20) PRIMARY KEY)
DECLARE #pos int
SET #pos=CHARINDEX(',',#FrameNumber)
WHILE #pos>0 BEGIN
INSERT #FrameNumbers SELECT LEFT(#FrameNumber,CHARINDEX(',',#FrameNumber)-1)
SET #FrameNumber = SUBSTRING(#FrameNumber,CHARINDEX(',',#FrameNumber)+1,LEN(#FrameNumber))
SET #pos=CHARINDEX(',',#FrameNumber)
END
IF LEN(#FrameNumber)>0 BEGIN
INSERT #FrameNumbers SELECT #FrameNumber
END
select from myTable where c1 in (select FrameNumber from #FrameNumbers)
thanks Quassnoi and Sam, this solution is just a combination of your solutions.

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