• Lynn Pettis (12/11/2012)


    Just some food for thought:

    declare @TestString varchar(8000) = '30;38469|31;38470|32;38471|33;38472|34;38473|35;38474|36;38475|37;38476|38;38477|';

    select

    max(case ds2.ItemNumber when 1 then ds2.Item else '' end) as field1,

    max(case ds2.ItemNumber when 2 then ds2.Item else '' end) as field2

    from

    dbo.DelimitedSplit8K(@TestString,'|') ds1

    cross apply dbo.DelimitedSplit8K(ds1.Item,';') ds2

    where

    ds1.Item <> ''

    group by

    ds1.ItemNumber;

    Uses Jeff's DelimitedSplit8K function as is.

    You will find the code for the dbo.DelimitedSplit8K function here: http://www.sqlservercentral.com/articles/Tally+Table/72993/.

    You're right, that's a much better idea. To make it work for the OPs requirements, I'd stick it in a sproc to generate the result-set dynamically so that the number of "field" doesn't need to be known before-hand.

    So first, we need Jeff's splitter: -

    IF EXISTS (SELECT 1

    FROM sysobjects

    WHERE id = OBJECT_ID('DelimitedSplit8K'))

    BEGIN

    DROP FUNCTION [dbo].[DelimitedSplit8K];

    END

    GO

    CREATE FUNCTION [dbo].[DelimitedSplit8K]

    --===== 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

    Then we need the calling sproc: -

    IF EXISTS (SELECT 1

    FROM sysobjects

    WHERE id = OBJECT_ID('SSC_Multi_Split'))

    BEGIN

    DROP PROCEDURE SSC_Multi_Split;

    END

    GO

    CREATE PROCEDURE SSC_Multi_Split (@string VARCHAR(8000), @rowDeliminater CHAR(1), @colDeliminater CHAR(1))

    AS

    BEGIN

    IF object_id('tempdb..#temporaryResultHolder') IS NOT NULL

    BEGIN

    DROP TABLE #temporaryResultHolder;

    END;

    SELECT ds1.ItemNumber AS rowNumber, ds2.ItemNumber AS columnNumber, ds2.Item AS data

    INTO #temporaryResultHolder

    FROM dbo.DelimitedSplit8K(@string, @rowDeliminater) ds1

    CROSS APPLY dbo.DelimitedSplit8K(ds1.Item, @colDeliminater) ds2

    WHERE ds1.Item <> '';

    DECLARE @SQL NVARCHAR(MAX);

    WITH CTE1(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),

    CTE2(N) AS (SELECT 1 FROM CTE1 X CROSS JOIN CTE1 Y),

    CTE3(N) AS (SELECT 1 FROM CTE2 X CROSS JOIN CTE2 Y),

    CTE4(N) AS (SELECT 1 FROM CTE3 X CROSS JOIN CTE3 Y),

    CTE5(N) AS (SELECT 1 FROM CTE4 X CROSS JOIN CTE4 Y),

    CTE6(N) AS (SELECT 1 FROM CTE5 X CROSS JOIN CTE5 Y),

    TALLY(N) AS (SELECT TOP (ISNULL(DATALENGTH(@string),0))

    ROW_NUMBER() OVER(ORDER BY (SELECT NULL))

    FROM CTE6)

    SELECT @SQL = STUFF((SELECT ','+CHAR(13)+CHAR(10)+'MAX(CASE WHEN columnNumber = '+CAST(N AS VARCHAR(20))+' THEN data ELSE '+CHAR(39)+CHAR(39)+' END) AS field'+CAST(N AS VARCHAR(20))

    FROM TALLY

    CROSS APPLY (SELECT TOP 1 columnNumber

    FROM #temporaryResultHolder

    ORDER BY columnNumber DESC) b

    WHERE columnNumber >= N

    FOR XML PATH(''), TYPE

    ).value('.', 'NVARCHAR(MAX)'),1,3,'');

    SELECT @SQL = 'SELECT '+@SQL+CHAR(13)+CHAR(10)+'FROM #temporaryResultHolder'+CHAR(13)+CHAR(10)+'GROUP BY rowNumber'+CHAR(13)+CHAR(10)+'ORDER BY rowNumber';

    EXECUTE sp_executeSQL @SQL;

    END

    GO

    And we execute as follows: -

    EXECUTE SSC_Multi_Split '30;38469|31;38470|32;38471|33;38472|34;38473|35;38474|36;38475|37;38476|38;38477|','|',';';


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