X-Original-To: pgsql-sql-postgresql.org@localhost.postgresql.org Received: from localhost (mx1.hub.org [200.46.208.251]) by postgresql.org (Postfix) with ESMTP id CFB6F11F61B7 for ; Fri, 28 Apr 2006 13:07:14 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.208.251]) (amavisd-new, port 10024) with ESMTP id 49695-06 for ; Fri, 28 Apr 2006 13:07:08 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey- Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by postgresql.org (Postfix) with ESMTP id A94DE11F602E for ; Fri, 28 Apr 2006 13:07:07 -0300 (ADT) Received: from sss2.sss.pgh.pa.us (tgl@localhost [127.0.0.1]) by sss.pgh.pa.us (8.13.6/8.13.6) with ESMTP id k3SG74mq001613; Fri, 28 Apr 2006 12:07:04 -0400 (EDT) To: Markus Schaber cc: PostgreSQL SQL List Subject: Re: Slightly confused error message In-reply-to: <44523BF1.1080307@logix-tt.com> References: <44523BF1.1080307@logix-tt.com> Comments: In-reply-to Markus Schaber message dated "Fri, 28 Apr 2006 17:59:45 +0200" Date: Fri, 28 Apr 2006 12:07:04 -0400 Message-ID: <1612.1146240424@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200604/207 X-Sequence-Number: 25016 Markus Schaber writes: > I just stumbled over a slightly confused error message: > mydb=# select count(*),coverage_area from myschema.streets except select > cd as coverage_area from countryref.disks group by streets.coverage_area; > ERROR: column "streets.coverage_area" must appear in the GROUP BY > clause or be used in an aggregate function > As the query looks, streets.coverage_area is actually used in the GROUP BY. The complaint is 100% accurate; the subquery that it's unhappy about is select count(*),coverage_area from myschema.streets which is an aggregating query, but coverage_area is being used outside an aggregate without having been grouped by. regards, tom lane