Thanks a lot for reply. Finally I have used UNION, but thanks for your help. -- View this message in context: http://postgresql.1045698.n5.nabble.com/Query-improvement-tp4362578p4378160.html Sent from the PostgreSQL - performance mailing list archive at Nabble.com. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
