sql - Multiple column values into a single column as comma separated value -


i have table commentstable columns like, commenta, commentb, commentc, commentd, commente.

all comments columns varchar (200), default columns null also.

the data looks like:

commentid   commenta    commentb    commentc    commentd    commente --------------------------------------------------------------------- 12345       null        c 001       c 002       null        c 003 45678       c 005       null        null        c 007       null 67890       c 010       null        c 011       c 012       null 36912       c 021       c 023       c 024       c 025       c 026

i need avoid null values , remaining values concatenate comma.

so, expected output like:

commentid    commetdetails ------------------------------- 12345        c 001, c 002, c 003 45678        c 005, c 007 67890        c 010, c 011, c 012 36912        c 021, c 023, c 024, c 025, c 026

i tried simple query:

select commentid, isnull(commenta, '') + ', ' + isnull(commentb, '') + ', ' +         isnull(commentc, '') + ', ' + isnull(commentd, '') + ', ' +        isnull(commente, '') [commentdetails] commentstable ...... --some conditions

but unwanted comma occurred, added iif

select commentid,         iif(isnull(commenta, '') <> '', (commenta + ', '), '') +        iif(isnull(commentb, '') <> '', (commentb + ', '), '') +        iif(isnull(commentc, '') <> '', (commentc + ', '), '') +        iif(isnull(commentd, '') <> '', (commentd + ', '), '') +        isnull(commente, '') [commentdetails] commentstable ...... --some conditions

but here also, comma occurred in last position cases (if commentd, commete null.

is there way achieve solve cases.

sample sql fiddle

you can use isnull isnull(',' + commenta, '') , write query this.

select commentid,  stuff( isnull(',' + commenta, '') +  isnull(',' + commentb, '') +  isnull(',' + commentc, '') +  isnull(',' + commentd, '') + isnull(',' + commente, ''),1,1,'') [commentdetails] commentstable ...... //some conditions

see result in sql fiddle.


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