Home Forums SQL Server 2008 T-SQL (SS2K8) Append characters in a sentence after certain length RE: Append characters in a sentence after certain length

  • Jeff Moden (6/24/2013)


    ChrisM@Work (6/20/2013)


    Venkata-433090 (6/19/2013)


    Thanks for your response. Its kind of when the client retrieves the data.

    again, the 32 character count should start from where the pipe was placed.

    Shouldn't take too much effort to tailor this to your requirements:

    -- sample data

    ;WITH SampleData AS (

    SELECT

    MyString = RTRIM(STUFF(STUFF(MyString,32,0,'|'),64,0,'|'))

    FROM (

    SELECT MyString = CAST('ABCDEFGH IJKLMNOPQRS TUVWXYZ ABCDEFGHIJKLMN OPQRSTUVWXYZA BCDEFGHIJKLMNOP' AS VARCHAR(200))

    ) d

    )

    -- solution

    SELECT

    MyString,

    NewString =

    STUFF(

    STUFF(

    STUFF(

    STUFF(

    STUFF(

    STUFF(

    CleanString

    ,Pos1,0,CASE WHEN Pos1 > 1 THEN '|' ELSE '' END)

    ,Pos2,0,CASE WHEN Pos2 > 1 THEN '|' ELSE '' END)

    ,Pos3,0,CASE WHEN Pos3 > 1 THEN '|' ELSE '' END)

    ,Pos4,0,CASE WHEN Pos4 > 1 THEN '|' ELSE '' END)

    ,Pos5,0,CASE WHEN Pos5 > 1 THEN '|' ELSE '' END)

    ,Pos6,0,CASE WHEN Pos6 > 1 THEN '|' ELSE '' END)

    FROM SampleData

    CROSS APPLY (SELECT CleanString = REPLACE(MyString,'|','')) y

    CROSS APPLY ( -- get the position of the last ' ' in each 32 character 'line'

    SELECT

    Pos1 = MAX(CASE WHEN line = 1 THEN LastSpaceInLine+1 ELSE 1 END),

    Pos2 = MAX(CASE WHEN line = 2 THEN LastSpaceInLine+1 ELSE 1 END),

    Pos3 = MAX(CASE WHEN line = 3 THEN LastSpaceInLine+1 ELSE 1 END),

    Pos4 = MAX(CASE WHEN line = 4 THEN LastSpaceInLine+1 ELSE 1 END),

    Pos5 = MAX(CASE WHEN line = 5 THEN LastSpaceInLine+1 ELSE 1 END),

    Pos6 = MAX(CASE WHEN line = 6 THEN LastSpaceInLine+1 ELSE 1 END)

    FROM (

    SELECT

    x.line,

    LastSpaceInLine = MAX(n)

    FROM dbo.InlineTally (200) t

    CROSS APPLY (SELECT line = 1+n/32) x

    WHERE n <= LEN(MyString)

    AND SUBSTRING(MyString,t.n,1) = ' '

    GROUP BY x.line

    ) d

    ) x1

    -- Function dbo.InlineTally

    CREATE FUNCTION [dbo].[InlineTally]

    (@RowCount INT)

    RETURNS TABLE WITH SCHEMABINDING AS

    RETURN

    (

    WITH E1(N) AS ( -- 10 rows

    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

    ),

    E2(N) AS (SELECT 1 FROM E1 a, E1 b, E1 c), -- 10 x 10 x 10 rows

    E4(N) AS (SELECT 1 FROM E2 a, E2 b) --1000 x 1000 rows max

    SELECT TOP (@RowCount) n = ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) FROM E4

    )

    Very cool but try it with the following replacement and see what happens with "zz".

    SELECT MyString = CAST('aa bb cc dd ee ff gg hh ii jj kk ll mm nn oo pp qq rr ss tt uu vv ww xx yy zz' AS VARCHAR(200))

    Ah, of course - thanks Jeff, good spot. Here's a fix:

    -- sample data

    ;WITH SampleData AS (

    SELECT

    MyString = RTRIM(STUFF(STUFF(MyString,32,0,'|'),64,0,'|'))

    FROM (

    SELECT MyString = CAST('ABCDEFGH IJKLMNOPQRS TUVWXYZ ABCDEFGHIJKLMN OPQRSTUVWXYZA BCDEFGHIJKLMNOP' AS VARCHAR(200))

    UNION ALL SELECT 'aa bb cc dd ee ff gg hh ii jj kk ll mm nn oo pp qq rr ss tt uu vv ww xx yy zz'

    ) d

    )

    -- solution

    SELECT

    MyString,

    NewString =

    STUFF(

    STUFF(

    STUFF(

    STUFF(

    STUFF(

    STUFF(

    CleanString

    ,Pos1,0,CASE WHEN Pos1 > 1 THEN '|' ELSE '' END)

    ,Pos2,0,CASE WHEN Pos2 > 1 THEN '|' ELSE '' END)

    ,Pos3,0,CASE WHEN Pos3 > 1 THEN '|' ELSE '' END)

    ,Pos4,0,CASE WHEN Pos4 > 1 THEN '|' ELSE '' END)

    ,Pos5,0,CASE WHEN Pos5 > 1 THEN '|' ELSE '' END)

    ,Pos6,0,CASE WHEN Pos6 > 1 THEN '|' ELSE '' END)

    FROM SampleData

    CROSS APPLY (SELECT CleanString = REPLACE(MyString,'|','')) y

    CROSS APPLY ( -- get the position of the last ' ' in each WHOLE 32 character 'line'

    SELECT

    Pos1 = MAX(CASE WHEN LineNum = 1 THEN LastSpaceInLine+1 ELSE 1 END),

    Pos2 = MAX(CASE WHEN LineNum = 2 THEN LastSpaceInLine+1 ELSE 1 END),

    Pos3 = MAX(CASE WHEN LineNum = 3 THEN LastSpaceInLine+1 ELSE 1 END),

    Pos4 = MAX(CASE WHEN LineNum = 4 THEN LastSpaceInLine+1 ELSE 1 END),

    Pos5 = MAX(CASE WHEN LineNum = 5 THEN LastSpaceInLine+1 ELSE 1 END),

    Pos6 = MAX(CASE WHEN LineNum = 6 THEN LastSpaceInLine+1 ELSE 1 END)

    FROM (

    SELECT

    x.LineNum,

    LastSpaceInLine = MAX(n)

    FROM dbo.InlineTally (200) t

    CROSS APPLY (SELECT LineNum = 1+n/32) x

    WHERE n <= LEN(CleanString)/32*32

    AND SUBSTRING(CleanString,t.n,1) = ' '

    GROUP BY x.LineNum

    ) d

    ) x1

    “Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

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