-- CREATE SOME SAMPLE DATA TO USE TO TEST THE SOLUTION
IF object_id('tempdb..#temp') IS NOT NULL
BEGIN;
DROP TABLE #temp;
END;
SELECT ID, VAL
INTO #temp
FROM (VALUES(1,'ABC DEF GHI JKL'),
(2,'DEF DEF GHI JKL'),
(3,'D DEF GHI JKL'))a(ID,VAL);
GO
-- BEGINNING OF SOLUTION
IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = OBJECT_ID(N'[dbo].[DelimitedSplit8K]') AND xtype IN (N'FN', N'IF', N'TF'))
BEGIN;
DROP FUNCTION [dbo].[DelimitedSplit8K];
END;
GO
CREATE FUNCTION [dbo].[DelimitedSplit8K]
-- See http://www.sqlservercentral.com/articles/Tally+Table/72993/
--===== Define I/O parameters
(@pString VARCHAR(8000), @pDelimiter CHAR(1))
--WARNING!!! DO NOT USE MAX DATA-TYPES HERE! IT WILL KILL PERFORMANCE!
RETURNS TABLE WITH SCHEMABINDING AS
RETURN
--===== "Inline" CTE Driven "Tally Table" produces values from 1 up to 10,000...
-- enough to cover VARCHAR(8000)
WITH E1(N) AS (
SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL
SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL
SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1
), --10E+1 or 10 rows
E2(N) AS (SELECT 1 FROM E1 a, E1 b), --10E+2 or 100 rows
E4(N) AS (SELECT 1 FROM E2 a, E2 b), --10E+4 or 10,000 rows max
cteTally(N) AS (--==== This provides the "base" CTE and limits the number of rows right up front
-- for both a performance gain and prevention of accidental "overruns"
SELECT TOP (ISNULL(DATALENGTH(@pString),0)) ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) FROM E4
),
cteStart(N1) AS (--==== This returns N+1 (starting position of each "element" just once for each delimiter)
SELECT 1 UNION ALL
SELECT t.N+1 FROM cteTally t WHERE SUBSTRING(@pString,t.N,1) = @pDelimiter
),
cteLen(N1,L1) AS(--==== Return start and length (for use in substring)
SELECT s.N1,
ISNULL(NULLIF(CHARINDEX(@pDelimiter,@pString,s.N1),0)-s.N1,8000)
FROM cteStart s
)
--===== Do the actual split. The ISNULL/NULLIF combo handles the length for the final element when no delimiter is found.
SELECT ItemNumber = ROW_NUMBER() OVER(ORDER BY l.N1),
Item = SUBSTRING(@pString, l.N1, l.L1)
FROM cteLen l
;
GO
-- HOW DO WE USE THE SOLUTION ?
SELECT a.ID, a.VAL, ca.VAL
FROM #temp a
CROSS APPLY (SELECT STUFF((SELECT ' '+UPPER(SUBSTRING(c.Item,1,1))+LOWER(SUBSTRING(c.Item,2,LEN(c.Item)-1))
FROM #temp b
CROSS APPLY [dbo].[DelimitedSplit8K](b.VAL,' ') c
WHERE a.ID = b.ID
ORDER BY c.ItemNumber
FOR XML PATH(''), TYPE
).value('.','NVARCHAR(MAX)'),1,1,''
)
)ca(VAL);
-- RESULTS
ID VAL VAL
----------- --------------- -----------------
1 ABC DEF GHI JKL Abc Def Ghi Jkl
2 DEF DEF GHI JKL Def Def Ghi Jkl
3 D DEF GHI JKL D Def Ghi Jkl