Received: from maia.hub.org (maia-3.hub.org [200.46.204.243]) by mail.postgresql.org (Postfix) with ESMTP id 44C316332DB for ; Wed, 28 Apr 2010 14:06:07 -0300 (ADT) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.204.243]) (amavisd-maia, port 10024) with ESMTP id 04090-09 for ; Wed, 28 Apr 2010 17:06:00 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by mail.postgresql.org (Postfix) with ESMTP id 6D0476332B2 for ; Wed, 28 Apr 2010 14:06:00 -0300 (ADT) Received: from sss2.sss.pgh.pa.us (tgl@localhost [127.0.0.1]) by sss.pgh.pa.us (8.14.2/8.14.2) with ESMTP id o3SH5wU9020336; Wed, 28 Apr 2010 13:05:58 -0400 (EDT) To: Gary Chambers cc: pgsql-sql@postgresql.org Subject: Re: Inserting Multiple Random Rows In-reply-to: References: Comments: In-reply-to Gary Chambers message dated "Wed, 28 Apr 2010 12:22:23 -0400" Date: Wed, 28 Apr 2010 13:05:58 -0400 Message-ID: <20335.1272474358@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-1.795 tagged_above=-10 required=5 tests=AWL=0.115, BAYES_00=-1.9, T_RP_MATCHES_RCVD=-0.01 X-Spam-Level: X-Archive-Number: 201004/102 X-Sequence-Number: 34029 Gary Chambers writes: > INSERT INTO useraddrs(userid, addrdesc, city, stprov) > SELECT u.userid, 'Home', c.cityname, c.stateabbr > FROM users u, cities c > WHERE u.userid NOT IN (SELECT userid FROM useraddrs) > AND cid=(SELECT cid FROM cities ORDER BY RANDOM() LIMIT 1); > I am able to achieve most of what I am trying to accomplish, but once > the random number is selected, it doesn't change. What am I missing? I believe the sub-SELECT will only get executed once, since it has no dependency on the outer query. What were you expecting to happen? regards, tom lane