From: Tom Lane <tgl@sss.pgh.pa.us>
To: Iain <iain@mst.co.jp>
Cc: pgsql-sql@postgresql.org
Subject: Re: invalid 'having' clause
Date: Wed, 01 Dec 2004 21:54:39 -0500
Message-ID: <1697.1101956079@sss.pgh.pa.us> (raw)
In-Reply-To: <001601c4d815$d8f03430$7201a8c0@mst1x5r347kymb>
References: <001601c4d815$d8f03430$7201a8c0@mst1x5r347kymb>
"Iain" <iain@mst.co.jp> writes:
> Just a quick question out of curiosity, I was just wondering if this is
> supposed to be valid sql:
> select count(*) as cnt
> from sometable
> group by somecolumn
> having cnt > 1
No. The HAVING clause logically executes before the SELECT output list
does, so it makes no sense for it to refer to the output list entries.
regards, tom lane
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To: pgsql-sql@postgresql.org
Cc: tgl@sss.pgh.pa.us, iain@mst.co.jp
Subject: Re: invalid 'having' clause
In-Reply-To: <1697.1101956079@sss.pgh.pa.us>
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