Re: Consulta con Condicionales

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: Iván de Gyves López [[POD]] <biz004wm(at)gmail(dot)com>
Cc: pgsql-es-ayuda(at)postgresql(dot)org
Subject: Re: Consulta con Condicionales
Date: 2008-06-15 19:35:56
Message-ID: 20080615193556.GK8519@alvh.no-ip.org
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"Iván de Gyves López [[POD]]" escribió:

> -------------------------------------------------------------------------------------------------------------------------
> xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> SELECT COUNT( * ) AS cte FROM rde1 WHERE id = x AND group_id = y, CASE
> WHEN cte > 0 THEN true ELSE false END AS result;

Usa un subselect

select cte, case when cte > 0 then true else false end as result from
(select count(*) as cte from rde1 where id = x and group_id = y) as foo

--
Alvaro Herrera http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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