X-Original-To: pgsql-docs-postgresql.org@localhost.postgresql.org Received: from localhost (unknown [200.46.204.144]) by svr1.postgresql.org (Postfix) with ESMTP id B4EBB329E25 for ; Thu, 9 Sep 2004 19:38:23 +0100 (BST) Received: from svr1.postgresql.org ([200.46.204.71]) by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024) with ESMTP id 44361-08 for ; Thu, 9 Sep 2004 18:38:18 +0000 (GMT) Received: from davinci.ethosmedia.com (server226.ethosmedia.com [209.128.84.226]) by svr1.postgresql.org (Postfix) with ESMTP id 3FAE5329E0E for ; Thu, 9 Sep 2004 19:38:19 +0100 (BST) Received: from [63.195.55.98] (HELO spooky) by davinci.ethosmedia.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 6312725 for pgsql-docs@postgresql.org; Thu, 09 Sep 2004 11:39:38 -0700 Content-Type: text/plain; charset="iso-8859-1" From: Josh Berkus Organization: Aglio Database Solutions Subject: Fwd: [SQL] aggregate function stddev Date: Thu, 9 Sep 2004 11:38:21 -0700 User-Agent: KMail/1.4.3 To: pgsql-docs@postgresql.org MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Message-Id: <200409091138.21985.josh@agliodbs.com> X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, hits=0.0 tagged_above=0.0 required=5.0 tests= X-Spam-Level: X-Archive-Number: 200409/7 X-Sequence-Number: 2526 Folks, Sending this remark to the list so that I/we don't forget to patch it ..... ======================================== Just noticed that the postgres stddev is the stddev_sample formula. There are two different ways to calculate this value. Their difference is very small with large samle size. It would be nice to distinguish the two different versions. ======================================== -- Josh Berkus Aglio Database Solutions San Francisco