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I have a string value which has numeric values separated by comma and then by a pipe. I want to split them into a table with two columns. I could split the string by one delimiter but unfortunately couldn't find a way to split by two. Please help.
DECLARE #list NVARCHAR(MAX) = '1,101|2,202|3,303';
The result should be like below.
1 101
2 202
3 303
Thanks in advance.
If you're using SQL Server 2016 or Azure, you have access to the new SPLIT_STRING function. If not I recommend using Jeff Moden's DelimitedSplit8K function, which is widely regarded as the fastest, most efficient SQL based string splitter available...
DECLARE #list NVARCHAR(MAX) = '1,101|2,202|3,303';
SELECT
Col1 = LEFT(dsk.Item, sl.SplitLocation - 1),
Col2 = SUBSTRING(dsk.Item, sl.SplitLocation + 1, LEN(dsk.Item))
FROM
dbo.DelimitedSplit8K(#list, '|') dsk -- code for DelimitedSplit8K can be found here... http://www.sqlservercentral.com/articles/Tally+Table/72993/
CROSS APPLY ( VALUES (ISNULL(NULLIF(CHARINDEX(',', dsk.Item, 1), 0), 1)) ) sl (SplitLocation);
CREATE FUNCTION [dbo].[fn_Split_char](#text nvarchar(max), #delimiter varchar(20) = ' ')
RETURNS #Strings TABLE
(
position int IDENTITY PRIMARY KEY,
value nvarchar(max)
)
AS
BEGIN
DECLARE #index int
SET #index = -1
WHILE (LEN(#text) > 0)
BEGIN
SET #index = CHARINDEX(#delimiter , #text)
IF (#index = 0) AND (LEN(#text) > 0)
BEGIN
INSERT INTO #Strings VALUES (#text)
BREAK
END
IF (#index > 1)
BEGIN
INSERT INTO #Strings VALUES (LEFT(#text, #index - 1))
SET #text = RIGHT(#text, (LEN(#text) - #index))
END
ELSE
SET #text = RIGHT(#text, (LEN(#text) - #index))
END
RETURN
END
Select LEFT(value, Charindex(',', value) - 1) ,
RIGHT(value, Charindex(',', Reverse(value)) - 1) ,
* from [fn_Split_char] ('1,101|2,202|3,303', '|')
Use xml path and cross apply to create multiple rows for a single row based on the pipe separator and then use substring w.r.t the commas to derive two desired columns
Create table #temp(list nvarchar(max))
Insert into #temp values('1,101|2,202|3,303')
SELECT
Substring(Tbl.Col.value('./text()[1]','varchar(50)'),1,1)as col1,
Substring(Tbl.Col.value('./text()[1]','varchar(50)'),charindex(',',Tbl.Col.value('./text()[1]','varchar(50)'),1)+1,len(Tbl.Col.value('./text()[1]','varchar(50)')))
FROM
(Select cast('<a>'+ replace((SELECT list As [*] FOR XML PATH ('')), '|', '</a><a>') + '</a>' as xml)as t
from #temp) tl
Cross apply
tl.t.nodes('/a') AS Tbl(Col)
Try using this Table-valued Function, embed this SP to your main SP
ALTER FUNCTION [dbo].[delimiter]
(
#PARAM_IDS AS VARCHAR(MAX)
#PARAM_DELIMITER AS CHAR(1)
)
RETURNS
#NEW_TABLE TABLE
(
NUM INT NOT NULL IDENTITY,
ID INT NOT NULL
)
AS
BEGIN
DECLARE #NEXTSTRING AS NVARCHAR(MAX);
DECLARE #POS AS INT;
DECLARE #STRING AS NVARCHAR(MAX);
DECLARE #DELIMITER AS NVARCHAR(MAX);
SET #STRING = #PARAM_IDS;
SET #DELIMITER = #PARAM_DELIMITER;
SET #STRING = #STRING + #DELIMITER;
SET #POS = CHARINDEX(#DELIMITER,#STRING);
WHILE (#POS <> 0)
BEGIN
SET #NEXTSTRING = SUBSTRING(#STRING,1,#POS - 1);
INSERT #NEW_TABLE (ID) VALUES (#NEXTSTRING);
SET #STRING = SUBSTRING(#STRING,#POS+1,len(#STRING));
SET #POS = CHARINDEX(#DELIMITER,#STRING);
END
RETURN
END
then example of use
SET #DETAILS_COUNT = (SELECT COUNT(*) FROM delimiter(#PARAM_MS_UNIT_ID, #DELIMITER));
With T-SQL, I'm trying to find the easiest way to reverse numbers in string. so for string like Test123Hello have Test321Hello.
[Before] [After]
Test123Hello Test321Hello
Tt143 Hello Tt341 Hello
12Hll 21Hll
Tt123H3451end Tt321H1543end
you can use this function
CREATE FUNCTION [dbo].[fn_ReverseDigit_MA]
(
#Str_IN nVARCHAR(max)
)
RETURNS NVARCHAR(max)
AS
BEGIN
DECLARE #lenstr AS INT =LEN(#Str_IN)
DECLARE #lastdigend AS INT=0
while (#lastdigend<#lenstr)
BEGIN
DECLARE #strPart1 AS NVARCHAR(MAX)=LEFT(#Str_IN,#lastdigend)
declare #lenstrPart1 AS INT=LEN(#strPart1)
DECLARE #strPart2 AS NVARCHAR(MAX)=RIGHT(#Str_IN,#lenstr-#lastdigend)
declare #digidx as int=patindex(N'%[0-9]%' ,#strPart2)+#lenstrPart1
IF(#digidx=#lenstrPart1)
BEGIN
BREAK;
END
DECLARE #strStartdig AS NVARCHAR(MAX) = RIGHT(#Str_IN,#lenstr-#digidx+1)
declare #NDidx as int=patindex(N'%[^0-9]%' ,#strStartdig)+#digidx-1
IF(#NDidx<=#digidx)
BEGIN
SET #NDidx=#lenstr+1
END
DECLARE #strRet AS NVARCHAR(MAX)=LEFT(#Str_IN,#digidx-1) +REVERSE(SUBSTRING(#Str_IN,#digidx,#NDidx-#digidx)) +RIGHT(#Str_IN,#lenstr-#NDidx+1)
SET #Str_IN=#strRet
SET #lastdigend=#NDidx-1
END
return #Str_IN
END
Just make use of PATINDEX for searching, append to the result string part by part:
CREATE FUNCTION [dbo].[fn_ReverseDigits]
(
#Value nvarchar(max)
)
RETURNS NVARCHAR(max)
AS
BEGIN
IF #Value IS NULL
RETURN NULL
DECLARE
#TextIndex int = PATINDEX('%[^0-9]%', #Value),
#NumIndex int = PATINDEX('%[0-9]%', #Value),
#ResultValue nvarchar(max) = ''
WHILE LEN(#ResultValue) < LEN(#Value)
BEGIN
-- Set the index to end of the string if the index is 0
SELECT #TextIndex = CASE WHEN #TextIndex = 0 THEN LEN(#Value) + 1 ELSE LEN(#ResultValue) + #TextIndex END
SELECT #NumIndex = CASE WHEN #NumIndex = 0 THEN LEN(#Value) + 1 ELSE LEN(#ResultValue) + #NumIndex END
IF #NumIndex < #TextIndex
SELECT #ResultValue = #ResultValue + REVERSE(SUBSTRING(#Value, #NumIndex, #TextIndex -#NumIndex))
ELSE
SELECT #ResultValue = #ResultValue + (SUBSTRING(#Value, #TextIndex, #NumIndex - #TextIndex))
-- Update index variables
SELECT
#TextIndex = PATINDEX('%[^0-9]%', SUBSTRING(#Value, LEN(#ResultValue) + 1, LEN(#Value) - LEN(#ResultValue))),
#NumIndex = PATINDEX('%[0-9]%', SUBSTRING(#Value, LEN(#ResultValue) + 1, LEN(#Value) - LEN(#ResultValue)))
END
RETURN #ResultValue
END
Test SQL
declare #Values table (Value varchar(20))
INSERT #Values VALUES
('Test123Hello'),
('Tt143 Hello'),
('12Hll'),
('Tt123H3451end'),
(''),
(NULL)
SELECT Value, dbo.fn_ReverseDigits(Value) ReversedValue FROM #Values
Result
Value ReversedValue
-------------------- --------------------
Test123Hello Test321Hello
Tt143 Hello Tt341 Hello
12Hll 21Hll
Tt123H3451end Tt321H1543end
NULL NULL
hope this help:
declare #s nvarchar(128) ='Test321Hello'
declare #numStart as int, #numEnd as int
select #numStart =patindex('%[0-9]%',#s)
select #numEnd=len(#s)-patindex('%[0-9]%',REVERSE(#s))
select
SUBSTRING(#s,0,#numstart)+
reverse(SUBSTRING(#s,#numstart,#numend-#numstart+2))+
SUBSTRING(#s,#numend+2,len(#s)-#numend)
Use this function it will handle multiple occurrence of numbers too
create FUNCTION [dbo].[GetReverseNumberFromString] (#String VARCHAR(2000))
RETURNS VARCHAR(1000)
AS
BEGIN
DECLARE #Count INT
DECLARE #IntNumbers VARCHAR(1000)
declare #returnstring varchar(max)=#String;
SET #Count = 0
SET #IntNumbers = ''
WHILE #Count <= LEN(#String)
BEGIN
IF SUBSTRING(#String, #Count, 1) >= '0'
AND SUBSTRING(#String, #Count, 1) <= '9'
BEGIN
SET #IntNumbers = #IntNumbers + SUBSTRING(#String, #Count, 1)
END
IF (
SUBSTRING(#String, #Count + 1, 1) < '0'
OR SUBSTRING(#String, #Count + 1, 1) > '9'
)
AND SUBSTRING(#String, #Count, 1) >= '0'
AND SUBSTRING(#String, #Count, 1) <= '9'
BEGIN
SET #IntNumbers = #IntNumbers + ','
END
SET #Count = #Count + 1
END
declare #RevStrings table (itemz varchar(50))
INSERT INTO #RevStrings(itemz)
select items from dbo.Split(#IntNumbers,',')
select #returnstring = Replace(#returnstring, itemz,REVERSE(itemz))from #RevStrings
RETURN #returnstring
END
your sample string
select [dbo].[GetReverseNumberFromString]('Tt123H3451end')
result
Tt321H1543end
UPDATE :
if you do not have Split function then first create it
i have included it below
create FUNCTION Split
(
#Input NVARCHAR(MAX),
#Character CHAR(1)
)
RETURNS #Output TABLE (
Items 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(Items)
SELECT SUBSTRING(#Input, #StartIndex, #EndIndex - 1)
SET #Input = SUBSTRING(#Input, #EndIndex + 1, LEN(#Input))
END
RETURN
END
GO
This is a set based approach:
;WITH Tally (n) AS
(
SELECT ROW_NUMBER() OVER (ORDER BY (SELECT NULL))
FROM (VALUES(0),(0),(0),(0),(0),(0),(0),(0),(0),(0)) a(n)
CROSS JOIN (VALUES(0),(0),(0),(0),(0),(0),(0),(0),(0),(0)) b(n)
CROSS JOIN (VALUES(0),(0),(0),(0),(0),(0),(0),(0),(0),(0)) c(n)
), UnpivotCTE AS (
SELECT id, x.c, n, y.isNumber,
n - ROW_NUMBER() OVER (PARTITION BY id, y.isNumber
ORDER BY n) AS grp
FROM mytable
CROSS JOIN Tally
CROSS APPLY (SELECT SUBSTRING(col, n, 1)) AS x(c)
CROSS APPLY (SELECT ISNUMERIC(x.c)) AS y(isNumber)
WHERE n <= LEN(col)
), ToConcatCTE AS (
SELECT id, c, n, isNumber,
grp + MIN(n) OVER (PARTITION BY id, isNumber, grp) AS grpAsc
FROM UnpivotCTE
)
SELECT id, col,
REPLACE(
(SELECT c AS [text()]
FROM ToConcatCTE AS t
WHERE t.id = m.id
ORDER BY id,
grpAsc,
CASE WHEN isNumber = 0 THEN n END,
CASE WHEN isNumber = 1 THEN n END DESC
FOR XML PATH('')), ' ',' ') AS col2
FROM mytable AS m
A tally table is used in order to 'unpivot' all characters of the string. Then ROW_NUMBER is used in order to identify islands of numeric and non-numeric characters. Finally, FOR XML PATH is used to reconstruct the initial string with numerical islands reversed: ORDER BY is used to sort islands of numeric characters in reversed order.
Fiddle Demo here
This would do the specific string you are asking for:
select
substring('Test123Hello',1,4)
+
reverse(substring('Test123Hello',5,3))
+
substring('Test123Hello',8,5)
Judging by the rest of the values it looks like you would need to make templates for any of the alphanumeric patterns you are getting. For example you would apply the above to any values that had the shape:
select * from [B&A] where [before] like '[a-z][a-z][a-z][a-z][0-9][0-9][0-9]
[a-z][a-z][a-z][a-z][a-z]'
In other words, if you put the values (before and after) into a table [B&A] and called the columns 'before' and 'after' then ran this:
select
substring(before,1,4)
+
reverse(substring(before,5,3))
+
substring(before,8,5) as [after]
from [B&A] where [before] like '[a-z][a-z][a-z][a-z][0-9][0-9][0-9][a-z]
[a-z][a-z][a-z][a-z]'
Then it would give you 'Test321Hello'.
However the other 3 rows would not be affected unless you created a similar
'[0-9][a-z]' type template for each alphanumeric shape and applied this to the [B&A] table. You would have to select the results into a temp table or another table.
By applying each template in turn you'd get most of it then you'd have to see how many rows were unaffected and check what the alphanumeric shape is and make more templates. Eventually you have a set of code which, if you ran it would capture all possible combinations.
You could just sit down and design a code in this way which captured all possible combinations of [a-z] and [0-9]. A lot depends on the maximum number of characters you are dealing with.
I've trying to create a UDF in SQL to return the longest word in a string. I've created the following but I cant get it to work properly. Any suggestions?
CREATE FUNCTION [dbo].[ufn_Longestword] (#input varchar(255))
RETURNS varchar(100)
AS
BEGIN
declare #pos int
declare #pos2 int
declare #wordpos int
declare #longestword varchar(100)
declare #Letter1 varchar (1)
declare #Letter2 varchar (1)
declare #twords table (
words varchar(100))
SET #pos = 1
WHILE #pos <= len(#input)
BEGIN
SET #Letter1 = substring(#input, #pos, 1)
IF #Letter1 = ' '
BEGIN
SET #pos2 = #pos
WHILE #pos2 <= len(#input)
BEGIN
SET #Letter2 = substring(#input, #pos2, 1)
if #letter2 = ' '
BEGIN
insert into #twords
select SUBSTRING(#input, #pos,#pos2 - #pos)
END
SET #pos2 = #pos2 + 1
END
END
SET #pos = #pos + 1
END
SET #longestword = (select top 1 words from #twords
ORDER BY len(words)desc)
delete from #twords
RETURN #longestword
END
I#m trying to get the different between the 2 spaces and insert that word into a temp table but it doesnt work.
Instead you can use this.
DECLARE #str VARCHAR(5000)='aaaa bbbbb cccccccc'
SELECT TOP 1 Split.a.value('.', 'VARCHAR(100)') as longest_Word
FROM (SELECT Cast ('<M>' + Replace(#str, ' ', '</M><M>') + '</M>' AS XML) AS Data) AS A
CROSS APPLY Data.nodes ('/M') AS Split(a)
ORDER BY Len(Split.a.value('.', 'VARCHAR(100)')) DESC
Result : cccccccc
i found this as solution :
click Here
CREATE FUNCTION FN_ex06(#str varchar(8000) )
RETURNS #T TABLE
( position int IDENTITY PRIMARY KEY,
value varchar(8000) ,
length smallint null
)
AS
BEGIN
DECLARE #i int
SET #i = -1
WHILE (LEN(#str) > 0)
BEGIN
SET #i = CHARINDEX(' ' , #str) /* here i used space as delimiter*/
IF (#i = 0) AND (LEN(#str) > 0)
BEGIN
INSERT INTO #T (value, length) VALUES (#str, LEN(#str))
BREAK
END
IF (#i > 1)
BEGIN
INSERT INTO #T (value, length) VALUES (LEFT(#str, #i - 1),
LEN(LEFT(#str, #i - 1)))
SET #str = RIGHT(#str, (LEN(#str) - #i))
END
ELSE
SET #str = RIGHT(#str, (LEN(#str) - #i))
END
RETURN
END
to run this function you treat it as table because return is a table
select max(value) from FN_ex06('karim pentester')
result is : pentester
of course you select all other columns in return table
This is the scenario:
My app will have the following:
A listbox (The checkbox property enabled) that will display a list of Something.
The user will select from the listbox (multiselect) by using the checkbox.
I will loop into All the checked items and store the ID's into an array. I will store the ID's into something like this separating the ID with a comma (1,2,3,4) and then I will use length -1 to delete the last comma.
How can I convert the string 1,2,3,4 into an integer type of data if my stored procedure is like this?
Select * from tblSomething Where ID in (1,2,3,4)
You can use the following SQL function.
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE FUNCTION [dbo].[CommaSeparatedToString]
(
#psCSString VARCHAR(8000)
)
RETURNS #otTemp TABLE(sID VARCHAR(20))
AS
BEGIN
DECLARE #sTemp VARCHAR(50)
WHILE LEN(#psCSString) > 0
BEGIN
SET #sTemp = LEFT(#psCSString, ISNULL(NULLIF(CHARINDEX(',', #psCSString) - 1, -1),
LEN(#psCSString)))
SET #psCSString = SUBSTRING(#psCSString,ISNULL(NULLIF(CHARINDEX(',', #psCSString), 0),
LEN(#psCSString)) + 1, LEN(#psCSString))
INSERT INTO #otTemp VALUES (#sTemp)
END
RETURN
END
And call in your stored procedure like
Select * from tblSomething
Where ID in (SELECT * FROM CommaSeparatedToString('1,2,3,4'))
You can use the
SELECT CAST(MyVarcharCol AS INT) FROM Table
SELECT CONVERT(INT, MyVarcharCol) FROM Table
refer this link
http://msdn.microsoft.com/en-us/library/ms187928.aspx
You need to create dynamic query for this
e.g you are getting list of values in #values paramter so prepare and run the dynamic query like this
DECLARE #query NVARCHAR(500)
DECLARE #values VARCHAR(200)
SET #values='1,2'
SET #query =N'Select * from tblSomething Where ID in ( ' + #values + ')'
SELECT #query
EXEC #Query
Use this function to split the value:
CREATE FUNCTION [dbo].[udfSplitCSV]
(
#String varchar (max),
#Delimiter varchar (10) = ','
)
RETURNS #ValueTable TABLE ([Row] int IDENTITY(1,1), [Value] varchar(max), [Length] int, [Duplicate] int NULL)
BEGIN
DECLARE #NextString varchar(max)
DECLARE #Pos int
DECLARE #NextPos int
IF #String IS NULL RETURN
--Initialize
SET #NextString = ''
SET #String = #String + #Delimiter
--Get position of first Comma
SET #Pos = charindex(#Delimiter,#String)
SET #NextPos = 1
--Loop while there is still a comma in the String
WHILE (#Pos <> 0)
BEGIN
SET #NextString = RTrim(LTrim(SubString(#String,1,#Pos - 1)))
INSERT INTO #ValueTable ([Value], [Length]) VALUES (#NextString, Len(#NextString))
SET #String = SubString(#String,#Pos+1,Len(#String))
SET #NextPos = #Pos
SET #Pos = CharIndex(#Delimiter,#String)
END
UPDATE #ValueTable
SET [Duplicate] = X.Duplicate
FROM #ValueTable VT
INNER JOIN (Select [Row], [Value], Row_Number() OVER (Partition By [Value] ORDER BY [Value], [Row]) as Duplicate FROM #ValueTable) X
ON X.[Row] = VT.[Row]
RETURN
END
-- Select * from dbo.udfSplitCSV('a , c b,c, a', ',')
When you are storing a bunch of IDs into the array, store with single quote.
so it will be ('1','2','3').
Then you no need to covert IDs into integer.
My table has one column that contain strings like: ” HRM_APPLICATION_DELAY_IN”
I want to perform bellow operations on each row on this column
convert to lower case
remove underscore “_”
change case (convert to upper case) of the character after the underscore like: ” hrm_Application_Delay_In”
Need help for conversion. Thanks for advance
Here is a function to achieve it:
create function f_test
(
#a varchar(max)
)
returns varchar(max)
as
begin
set #a = lower(#a)
while #a LIKE '%\_%' ESCAPE '\'
begin
select #a = stuff(#a, v, 2, upper(substring(#a, v+1,1)))
from (select charindex('_', #a) v) a
end
return #a
end
Example:
select dbo.f_test( HRM_APPLICATION_DELAY_IN')
Result:
hrmApplicationDelayIn
To update your table here is an example how to write the syntax with the function:
UPDATE <yourtable>
SET <yourcolumn> = dbo.f_test(col)
WHERE <yourcolumn> LIKE '%\_%' ESCAPE '\'
For a variable this is overkill, but I'm using this to demonstrate a pattern
declare #str varchar(100) = 'HRM_APPLICATION_DELAY_IN';
;with c(one,last,rest) as (
select cast(lower(left(#str,1)) as varchar(max)),
left(#str,1), stuff(lower(#str),1,1,'')
union all
select one+case when last='_'
then upper(left(rest,1))
else left(rest,1) end,
left(rest,1), stuff(rest,1,1,'')
from c
where rest > ''
)
select max(one)
from c;
That can be extended to a column in a table
-- Sample table
declare #tbl table (
id int identity not null primary key clustered,
str varchar(100)
);
insert #tbl values
('HRM_APPLICATION_DELAY_IN'),
('HRM_APPLICATION_DELAY_OUT'),
('_HRM_APPLICATION_DELAY_OUT'),
(''),
(null),
('abc<de_fg>hi');
-- the query
;with c(id,one,last,rest) as (
select id,cast(lower(left(str,1)) as varchar(max)),
left(str,1), stuff(lower(str),1,1,'')
from #tbl
union all
select id,one+case when last='_'
then upper(left(rest,1))
else left(rest,1) end,
left(rest,1), stuff(rest,1,1,'')
from c
where rest > ''
)
select id,max(one)
from c
group by id
option (maxrecursion 0);
-- result
ID COLUMN_1
1 hrm_Application_Delay_In
2 hrm_Application_Delay_Out
3 _Hrm_Application_Delay_Out
4
5 (null)
6 abc<de_Fg>hi
select
replace(replace(replace(replace(replace(replace(replace(
replace(replace(replace(replace(replace(replace(replace(
replace(replace(replace(replace(replace(replace(replace(
replace(replace(replace(replace(replace(replace(lower('HRM_APPLICATION_DELAY_IN'),'_a','A'),'_b','B'),'_c','C'),'_d','D'),'_e','E'),'_f','F'),
'_g','G'),'_h','H'),'_i','I'),'_j','J'),'_k','K'),'_l','L'),
'_m','M'),'_n','N'),'_o','O'),'_p','P'),'_q','Q'),'_r','R'),
'_s','S'),'_t','T'),'_u','U'),'_v','V'),'_w','W'),'_x','X'),
'_y','Y'),'_z','Z'),'_','')
Bellow two steps can solve problem,as example i use sys.table.user can use any one
declare #Ret varchar(8000), #RetVal varchar(8000), #i int, #count int = 1;
declare #c varchar(10), #Text varchar(8000), #PrevCase varchar, #ModPrefix varchar(10);
DECLARE #FileDataTable TABLE(TableName varchar(200))
INSERT INTO #FileDataTable
select name FROM sys.tables where object_name(object_id) not like 'sys%' order by name
SET #ModPrefix = 'Pur'
DECLARE crsTablesTruncIns CURSOR
FOR select TableName FROM #FileDataTable
OPEN crsTablesTruncIns
FETCH NEXT FROM crsTablesTruncIns INTO #Text
WHILE ##FETCH_STATUS = 0
BEGIN
SET #RetVal = '';
select #i=1, #Ret = '';
while (#i <= len(#Text))
begin
SET #c = substring(#Text,#i,1)
--SET #Ret = #Ret + case when #Reset=1 then UPPER(#c) else LOWER(#c)
IF(#PrevCase = '_' OR #i = 1)
SET #Ret = UPPER(#c)
ELSE
SET #Ret = LOWER(#c)
--#Reset = case when #c like '[a-zA-Z]' then 0 else 1 end,
if(#c like '[a-zA-Z]')
SET #RetVal = #RetVal + #Ret
if(#c = '_')
SET #PrevCase = '_'
else
SET #PrevCase = ''
SET #i = #i +1
end
SET #RetVal = #ModPrefix + #RetVal
print cast(#count as varchar) + ' ' + #RetVal
SET #count = #count + 1
EXEC sp_RENAME #Text , #RetVal
SET #RetVal = ''
FETCH NEXT FROM crsTablesTruncIns INTO #Text
END
CLOSE crsTablesTruncIns
DEALLOCATE crsTablesTruncIns
I'd like to show you my nice and simple solution. It uses Tally function to split the string by pattern, in our case by underscope. For understanding Tally functions, read this article.
So, this is how my tally function looks like:
CREATE FUNCTION [dbo].[tvf_xt_tally_split](
#String NVARCHAR(max)
,#Delim CHAR(1))
RETURNS TABLE
as
return
(
WITH Tally AS (SELECT top (select isnull(LEN(#String),100)) n = ROW_NUMBER() OVER(ORDER BY [name]) from master.dbo.syscolumns)
(
SELECT LTRIM(RTRIM(SUBSTRING(#Delim + #String + #Delim,N+1,CHARINDEX(#Delim,#Delim + #String + #Delim,N+1)-N-1))) Value, N as Ix
FROM Tally
WHERE N < LEN(#Delim + #String + #Delim)
AND SUBSTRING(#Delim + #String + #Delim,N,1) = #Delim
)
)
This function returns a table, where each row represents part of string between #Delim (in our case between underscopes). Rest of the work is simple, just cobination of LEFT, RIGHT, LEN, UPPER and LOWER functions.
declare #string varchar(max)
set #string = ' HRM_APPLICATION_DELAY_IN'
-- convert to lower case
set #string = LOWER(#string)
declare #output varchar(max)
-- build string
select #output = coalesce(#output + '_','') +
UPPER(left(Value,1)) + RIGHT(Value, LEN(Value) - 1)
from dbo.tvf_xt_tally_split(#string, '_')
-- lower first char
select left(lower(#output),1) + RIGHT(#output, LEN(#output) - 1)