SQL Server 2005 Using CHARINDEX() To split a string - sql

Question

How can I split the following string based on the '-' character?
So if I had this string: LD-23DSP-1430
How could I split it into separate columns like this:
LD 23DSP 1430
Also, is there a way to split each character into a separate field if I needed to (without the '-')? I'm trying to find a way to replace each letter with the NATO alphabet.
So this would be..... Lima Delta Twenty Three Delta Sierra Papa Fourteen Thirty.... in one field.
I know I can get the left side like this:
LEFT(#item, CHARINDEX('-', #item) - 1)

Answer 1

I wouldn't exactly say it is easy or obvious, but with just two hyphens, you can reverse the string and it is not too hard:
with t as (select 'LD-23DSP-1430' as val)
select t.*,
LEFT(val, charindex('-', val) - 1),
SUBSTRING(val, charindex('-', val)+1, len(val) - CHARINDEX('-', reverse(val)) - charindex('-', val)),
REVERSE(LEFT(reverse(val), charindex('-', reverse(val)) - 1))
from t;
Beyond that and you might want to use split() instead.

Answer 2

Here's a little function that will do "NATO encoding" for you:
CREATE FUNCTION dbo.NATOEncode (
#String varchar(max)
)
RETURNS TABLE
WITH SCHEMABINDING
AS
RETURN (
WITH L1 (N) AS (SELECT 1 UNION ALL SELECT 1),
L2 (N) AS (SELECT 1 FROM L1, L1 B),
L3 (N) AS (SELECT 1 FROM L2, L2 B),
L4 (N) AS (SELECT 1 FROM L3, L3 B),
L5 (N) AS (SELECT 1 FROM L4, L4 C),
L6 (N) AS (SELECT 1 FROM L5, L5 C),
Nums (Num) AS (SELECT Row_Number() OVER (ORDER BY (SELECT 1)) FROM L6)
SELECT
NATOString = Substring((
SELECT
Convert(varchar(max), ' ' + D.Word)
FROM
Nums N
INNER JOIN (VALUES
('A', 'Alpha'),
('B', 'Beta'),
('C', 'Charlie'),
('D', 'Delta'),
('E', 'Echo'),
('F', 'Foxtrot'),
('G', 'Golf'),
('H', 'Hotel'),
('I', 'India'),
('J', 'Juliet'),
('K', 'Kilo'),
('L', 'Lima'),
('M', 'Mike'),
('N', 'November'),
('O', 'Oscar'),
('P', 'Papa'),
('Q', 'Quebec'),
('R', 'Romeo'),
('S', 'Sierra'),
('T', 'Tango'),
('U', 'Uniform'),
('V', 'Victor'),
('W', 'Whiskey'),
('X', 'X-Ray'),
('Y', 'Yankee'),
('Z', 'Zulu'),
('0', 'Zero'),
('1', 'One'),
('2', 'Two'),
('3', 'Three'),
('4', 'Four'),
('5', 'Five'),
('6', 'Six'),
('7', 'Seven'),
('8', 'Eight'),
('9', 'Niner')
) D (Digit, Word)
ON Substring(#String, N.Num, 1) = D.Digit
WHERE
N.Num <= Len(#String)
FOR XML PATH(''), TYPE
).value('.[1]', 'varchar(max)'), 2, 2147483647)
);
This function will work on even very long strings, and performs pretty well (I ran it against a 100,000-character string and it returned in 589 ms). Here's an example of how to use it:
SELECT NATOString FROM dbo.NATOEncode('LD-23DSP-1430');
-- Output: Lima Delta Two Three Delta Sierra Papa One Four Three Zero
I intentionally made it a table-valued function so it could be inlined into a query if you run it against many rows at once, just use CROSS APPLY or wrap the above example in parentheses to use it as a value in the SELECT clause (you can put a column name in the function parameter position).

Answer 3

Try the following query:
DECLARE #item VARCHAR(MAX) = 'LD-23DSP-1430'
SELECT
SUBSTRING( #item, 0, CHARINDEX('-', #item)) ,
SUBSTRING(
SUBSTRING( #item, CHARINDEX('-', #item)+1,LEN(#ITEM)) ,
0 ,
CHARINDEX('-', SUBSTRING( #item, CHARINDEX('-', #item)+1,LEN(#ITEM)))
),
REVERSE(SUBSTRING( REVERSE(#ITEM), 0, CHARINDEX('-', REVERSE(#ITEM))))

Answer 4

USE [master]
GO
/****** this function returns Pakistan where as if you want to get ireland simply replace (SELECT SUBSTRING(#NEWSTRING,CHARINDEX('$#$#$',#NEWSTRING)+5,LEN(#NEWSTRING))) with
SELECT #NEWSTRING = (SELECT SUBSTRING(#NEWSTRING, 0,CHARINDEX('$#$#$',#NEWSTRING)))******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE FUNCTION [dbo].[FN_RETURN_AFTER_SPLITER]
(
#SPLITER varchar(max))
RETURNS VARCHAR(max)
AS
BEGIN
--declare #testString varchar(100),
DECLARE #NEWSTRING VARCHAR(max)
-- set #teststring = '#ram?eez(ali)'
SET #NEWSTRING = #SPLITER ;
SELECT #NEWSTRING = (SELECT SUBSTRING(#NEWSTRING,CHARINDEX('$#$#$',#NEWSTRING)+5,LEN(#NEWSTRING)))
return #NEWSTRING
END
--select [dbo].[FN_RETURN_AFTER_SPLITER] ('Ireland$#$#$Pakistan')

Answer 5

Create FUNCTION [dbo].[fnSplitString]
(
#string NVARCHAR(200),
#delimiter CHAR(1)
)
RETURNS #output TABLE(splitdata NVARCHAR(10)
)
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**strong text**

Answer 6

DECLARE #variable VARCHAR(100) = 'LD-23DSP-1430';
WITH Split
AS ( SELECT #variable AS list ,
charone = LEFT(#variable, 1) ,
R = RIGHT(#variable, LEN(#variable) - 1) ,
'A' AS MasterOne
UNION ALL
SELECT Split.list ,
LEFT(Split.R, 1) ,
R = RIGHT(split.R, LEN(Split.R) - 1) ,
'B' AS MasterOne
FROM Split
WHERE LEN(Split.R) > 0
)
SELECT *
FROM Split
OPTION ( MAXRECURSION 10000 );