From: | Abel Camarillo <acamari(at)the00z(dot)org> |
---|---|
To: | marco santillan <marco_equis(at)yahoo(dot)es> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: Query |
Date: | 2009-05-25 06:04:36 |
Message-ID: | 20090525060436.GC22717@maetel.00z |
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Thread: | |
Lists: | pgsql-general |
On Mon, May 25, 2009 at 02:56:10AM +0000, marco santillan wrote:
>
> Hola a todos:
>
> Tengo la siguiente inquietud. En una consulta com la siguiente:
>
> select campo1,
> campo2,
> campo1 - campo2 as campo_virtual,
> campo3,
> case when campo_virtual = 1 then 5 else 0 end as segundo_campo_virtual
> from tabla;
>
> Esto lo puedo hacer en access sin ningun problema, pero en postgresql no reconoce el campo_virtual.
>
> ¿Es que postgresql no soporta esta consulta o existe algun otro metodo para lograr esta tecnica?
>
>
> Nota: (campo1 - campo2) en realidad es una compleja consulta que se usa varias veces lineas abajo.
>
> Marco.-
>
>
>
>
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going to answer.
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