Possible Duplicate:
Building a comma separated list?
Concatenate values based on ID
How to Comma separate multiple rows obtained from a SQL Query
Combing values of a column on multiple rows.?
I have tables like this:
ID Tag
1 abc
1 def
1 ghi
2 acf
2 klv
and I want this
ID Tag
1 abc, def, ghi
2 acf, klv
How this can be done?
Thanks.