Обсуждение: Except without elimination of non-distinct rows

Is there any way to use except that won't remove the non-distinct rows from
the left side of the query?

"Ray Madigan" <ray@madigans.org> writes:
> Is there any way to use except that won't remove the non-distinct rows from
> the left side of the query?

EXCEPT ALL might or might not do what you're hoping for.  Check the
manual (I think the SELECT reference page is what to look at).
        regards, tom lane

I tried using EXCEPT ALL but it seems to only remove one row when there is
more then one matching row?

Thanks
Ray Madigan


-----Original Message-----
From: pgsql-sql-owner@postgresql.org
[mailto:pgsql-sql-owner@postgresql.org]On Behalf Of Tom Lane
Sent: Monday, February 04, 2008 6:20 PM
To: Ray Madigan
Cc: Pgsql-Sql
Subject: Re: [SQL] Except without elimination of non-distinct rows


"Ray Madigan" <ray@madigans.org> writes:
> Is there any way to use except that won't remove the non-distinct rows
from
> the left side of the query?

EXCEPT ALL might or might not do what you're hoping for.  Check the
manual (I think the SELECT reference page is what to look at).
        regards, tom lane