Received: from maia.hub.org (maia-5.hub.org [200.46.204.29])
	by mail.postgresql.org (Postfix) with ESMTP id B42361337BCB
	for <pgsql-sql-postgresql.org@mail.postgresql.org>;
	Mon, 10 Jan 2011 22:14:23 -0400 (AST)
Received: from mail.postgresql.org ([200.46.204.86])
	by maia.hub.org (mx1.hub.org [200.46.204.29]) (amavisd-maia, port 10024)
	with ESMTP id 77819-10 for
	<pgsql-sql-postgresql.org@mail.postgresql.org>;
	Tue, 11 Jan 2011 02:14:17 +0000 (UTC)
X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6
Received: from mail-wy0-f174.google.com (mail-wy0-f174.google.com
	[74.125.82.174])
	by mail.postgresql.org (Postfix) with ESMTP id 216381337BCA
	for <pgsql-sql@postgresql.org>; Mon, 10 Jan 2011 22:14:14 -0400 (AST)
Received: by wyb28 with SMTP id 28so20017209wyb.19
	for <pgsql-sql@postgresql.org>; Mon, 10 Jan 2011 18:14:14 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma;
	h=domainkey-signature:received:received:message-id:date:from
	:user-agent:mime-version:to:subject:content-type
	:content-transfer-encoding;
	bh=wvVCribgiddHwS51xS+UojUr5kyhGz8orn6qCsLK01o=;
	b=nD+I8ra/VRD+TZZy88YczLV/3iKQaXTOQMZnAGq/jozAFPWLD41haUO0pQ5gSJA8vO
	1VSVySzgzXYtgtxar8cUaVhWj8D1F18gL0/mGB9/V+dFvWytvWB+pWTEKqvCv6ecDOJN
	ZgfdZvqOEmrrsQ2EiubnJqFFzeqc8v9WSGudE=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma;
	h=message-id:date:from:user-agent:mime-version:to:subject
	:content-type:content-transfer-encoding;
	b=HTcBAunpLBke7FSd1ZsKyE7YcM+Dw9fl6HWoCKnyMJt+5N40aN5L0HugFnJYh7RJC3
	SCI6KcUyrMjLDHKRMlllr4ovLBiqA7PRVWRtTjUMkTOEQ+zgBukPCcBz99bxfCewFJDb
	4roHEmzbbF/ZgrwYNNZRtjsOcoCjNSWfGPEHw=
Received: by 10.227.136.211 with SMTP id s19mr3291419wbt.177.1294712054411;
	Mon, 10 Jan 2011 18:14:14 -0800 (PST)
Received: from [10.0.0.5] (heaton.plus.com [212.159.45.120])
	by mx.google.com with ESMTPS id m13sm20562894wbz.21.2011.01.10.18.14.13
	(version=SSLv3 cipher=RC4-MD5); Mon, 10 Jan 2011 18:14:13 -0800 (PST)
Message-ID: <4D2BBCF4.8070905@gmail.com>
Date: Tue, 11 Jan 2011 02:14:12 +0000
From: gvim <gvimrc@gmail.com>
User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US;
	rv:1.8.1.23) Gecko/20090812 Lightning/0.9 Thunderbird/2.0.0.23
	Mnenhy/0.7.5.0
MIME-Version: 1.0
To: pgsql sql <pgsql-sql@postgresql.org>
Subject: Find NOT NULLs in a group of 20 columns
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-Virus-Scanned: Maia Mailguard 1.0.1
X-Spam-Status: No, hits=-2.598 tagged_above=-5 required=5 tests=BAYES_00=-1.9,
	FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7,
	RFC_ABUSE_POST=0.001
X-Spam-Level: 
X-Archive-Number: 201101/22
X-Sequence-Number: 34969

I'm struggling to find anything other than a complex stored proc to do this:

Out of a group of 20 columns return the rows in which:

1. Only 1 of the 20 columns IS NOT NULL
2. More than 1 of the 20 columns IS NOT NULL

Any ideas?

gvim