> From: Thomas Munro [mailto:thomas.munro@xxxxxxxxxxxxxxxx] > FWIW standard SQL may not allow it but Postgres does, and it's even possible > to exclude duplicates by using an expression that references the whole row. Thank you. I didn't know that. I'll use it if I can verify it works right. It's not that important -- Andl can emulate it quite easily. Regards David M Bennett FACS Andl - A New Database Language - andl.org -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general