On Sun, Dec 20, 2015 at 11:39 PM, Sterpu Victor <victor@xxxxxxxx> wrote: > Thank you. > > I used the syntax with 2 indexes, it works for me. > But why does NULL != NULL? Because NULL literally means "an unknown, possibly unknowable value." You need to stop thinking of NULL as A value. It is not. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
