On Tue, Mar 23, 2004 at 11:21:39 -0500,
Phil Endecott <spam_from_postgresql_lists@chezphil.org> wrote:
> Does anyone have any suggestions about how to do this? I'd like a nice
> general technique that works for all possible subqueries, as my current
> composition with INTERSECT does.
One adjustment you might make is using INTERSECT ALL if you know there
can't be duplicates. Then time won't be wasted trying to remove duplicates.