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Variation on comma-separated strings in T-SQL

Posted on 2013-05-10
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Last Modified: 2013-05-16
I have a SELECT statement which yields data in the following pattern:

Category      Item
------------  -------
Red            A
Red            B
Red            C
Blue           A
Blue           D
Blue           E
Blue           F

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I need to instead produce this:

Category      Item
------------  -------
Red           A,B,C
Blue          A,D,E,F

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Thanks!
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Question by:wlevy
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Assisted Solution

by:Surendra Nath
Surendra Nath earned 500 total points
ID: 39157569
try this

select Y2.Category,(select stuff((select ',' + Item from <yourTable> Y1 where Y1.Category = Y2.Category for xml path('')),1,1,'')
from <yourTable> Y2
group by Y2.Category

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Author Comment

by:wlevy
ID: 39158305
I get an error: The multi-part identifier "Y2.Category" could not be bound. This is on "Y2.Category" immediately following "select"  on line 1.
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Accepted Solution

by:
wlevy earned 0 total points
ID: 39158725
I got it now:

select Y2.Category, stuff((select ',' + Item from <yourTable> Y1 where Y1.Category = Y2.Category for xml path('')),1,1,'')
from <yourTable> Y2

Thanks for pointing me in the right direction,
0
 

Author Comment

by:wlevy
ID: 39158726
Oops, my solution was missing DISTINCT. Should be...

SELECT DISTINCT B.FunctionName, STUFF((SELECT ',' + A.WBSID FROM @table A WHERE A.FunctionName = B.FunctionName FOR XML PATH('')),1,1,'')
FROM @table B
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Author Closing Comment

by:wlevy
ID: 39170734
Neo_Jarvis had the right idea but obviously didn't test his solution, which was buggy.
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