Re: usar count en clausula where

From: Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>
To: deepthroat <dblackbeer(at)gmail(dot)com>
Cc: pgsql-es-ayuda(at)postgresql(dot)org
Subject: Re: usar count en clausula where
Date: 2005-10-11 21:09:56
Message-ID: 20051011210956.GA28967@surnet.cl
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deepthroat escribió:
> Tengo la siguiente consulta
>
> select codigo, count(*) as cant from tabla group by codigo
>
> Y necesito usar el resultado del count en la clausula where:

Tienes que usar la clausula HAVING, no la clausula WHERE. WHERE se
aplica antes de la agrupacion (group by); HAVING se aplica a los grupos.

--
Alvaro Herrera http://www.amazon.com/gp/registry/DXLWNGRJD34
"On the other flipper, one wrong move and we're Fatal Exceptions"
(T.U.X.: Term Unit X - http://www.thelinuxreview.com/TUX/)

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