Say I have a table tbl1 with two columns: tbl1(a integer, b integer, c integer) I want to select the rows in which a and b are members of a list of integer pairs. The SQL in my mind is something like: select * from tbl1 where (a, b) in ((1, 20), (2, 30), (3, 50)); I know the SQL above does not work in PostgreSQL. I wonder what is the proper way to use in PostgreSQL. I tried "select * from tbl1 where (a, b) in ('{{1, 20}, {2, 30}, {3, 50}}')", and it doesn't work either. Thanks! Sophie __________________________________ Yahoo! Mail Mobile Take Yahoo! Mail with you! Check email on your mobile phone. http://mobile.yahoo.com/learn/mail ---------------------------(end of broadcast)--------------------------- TIP 8: explain analyze is your friend