From: Rod Taylor <pg@rbt.ca>
To: Philippe Lang <philippe.lang@attiksystem.ch>
Cc: pgsql-sql@postgresql.org
Subject: Re: Reuse previously calculated column in sql query?
Date: Wed, 20 Oct 2004 09:05:38 -0400
Message-ID: <1098277537.747.91.camel@home> (raw)
In-Reply-To: <6C0CF58A187DA5479245E0830AF84F42080442@poweredge.attiksystem.ch>
References: <6C0CF58A187DA5479245E0830AF84F42080442@poweredge.attiksystem.ch>
On Wed, 2004-10-20 at 08:50, Philippe Lang wrote:
> Hello,
>
> Is it possible to reuse a previously calculated column in a following
> column, like:
SELECT col1
, col2
, col2 * 0.75 AS col3
FROM (SELECT foo.val1 AS col1
, long_calculation(foo.val1) AS col2
FROM foo) AS tab;
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To: pgsql-sql@postgresql.org
Cc: pg@rbt.ca, philippe.lang@attiksystem.ch
Subject: Re: Reuse previously calculated column in sql query?
In-Reply-To: <1098277537.747.91.camel@home>
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