Re: query help

From: Stephan Szabo <sszabo(at)megazone23(dot)bigpanda(dot)com>
To: Rob Larter <rob(at)cdli(dot)co(dot)uk>
Cc: <pgsql-general(at)postgresql(dot)org>
Subject: Re: query help
Date: 2003-05-14 15:41:44
Message-ID: 20030514083820.X44794-100000@megazone23.bigpanda.com
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On Wed, 14 May 2003, Rob Larter wrote:

> hi i am trying to execute the following query:
>
> select source,(b.source/c.total),(select count(*) from entries b where
> source = a.source) as source,(select count(*) from entries c) as total from
> entries a group by source;
>
> it says
> ERROR: Relation "b" does not exist

Right, because it doesn't escape the subselect.

Maybe something like:
select source, ecount/etotalcount, ecount as source, etotalcount as total
from
(select source, count(*) as ecount from entries group by source) as t,
(select count(*) as etotalcount from entries) as t1;

In response to

  • query help at 2003-05-14 10:55:47 from Rob Larter

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