> > In my "-1" example, am I right in assuming that I created a correlated > subquery rather than an correlated one? I'm confused about the > difference. > >
Correlated: has a where clause that references the outer query Un-correlated: not correlated Because of the where clause a correlated sub-query will return a different record for each row whereas an un-correlated sub-query will return the same record for all rows since the where clause (if any) is constant. David J. -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
