X-Original-To: pgsql-sql-postgresql.org@localhost.postgresql.org Received: from localhost (unknown [200.46.204.2]) by svr1.postgresql.org (Postfix) with ESMTP id E395FD1E747 for ; Thu, 6 May 2004 22:26:59 -0300 (ADT) Received: from svr1.postgresql.org ([200.46.204.71]) by localhost (neptune.hub.org [200.46.204.2]) (amavisd-new, port 10024) with ESMTP id 38487-10 for ; Thu, 6 May 2004 22:26:42 -0300 (ADT) Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by svr1.postgresql.org (Postfix) with ESMTP id C0DC9D1EC1F for ; Thu, 6 May 2004 22:26:38 -0300 (ADT) Received: from sss2.sss.pgh.pa.us (tgl@localhost [127.0.0.1]) by sss.pgh.pa.us (8.12.11/8.12.11) with ESMTP id i471QX2l026991; Thu, 6 May 2004 21:26:34 -0400 (EDT) To: Francesc Leveque Cc: pgsql-sql@postgresql.org Subject: Re: Subselect returning 2 columns In-reply-to: <4099FCB4.1090300@loroadictos.com> References: <4099FCB4.1090300@loroadictos.com> Comments: In-reply-to Francesc Leveque message dated "Thu, 06 May 2004 10:52:04 +0200" Date: Thu, 06 May 2004 21:26:33 -0400 Message-ID: <26990.1083893193@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: by amavisd-new at postgresql.org X-Spam-Status: No, hits=0.0 tagged_above=0.0 required=5.0 tests= X-Spam-Level: X-Archive-Number: 200405/61 X-Sequence-Number: 17775 Francesc Leveque writes: > Is correct to do something like?: > SELECT row1,row2 FROM mytable > WHERE (row1,row3) IN > (SELECT row1 as p1,MAX(row3) as p2 FROM mytable > WHERE row3 <= current_date > GROUP BY row1) Sure. > I mean, I don't see documentation about subselects returning more than > one column, but it seems to work... http://www.postgresql.org/docs/7.4/static/functions-subquery.html#AEN12497 regards, tom lane