From: | "Jaime Casanova" <systemguards(at)gmail(dot)com> |
---|---|
To: | "Victor Lopez" <d01m01a2000(at)gmail(dot)com> |
Cc: | "Felipe Fernandez" <ffdezrguez(at)tiscali(dot)es>, Postgresql <pgsql-es-ayuda(at)postgresql(dot)org> |
Subject: | Re: Union |
Date: | 2007-04-28 04:30:33 |
Message-ID: | c2d9e70e0704272130q4d75d7bdp5bcb0b503a795f70@mail.gmail.com |
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Lists: | pgsql-es-ayuda |
On 4/27/07, Victor Lopez <d01m01a2000(at)gmail(dot)com> wrote:
> > select referencia, foto1, localidad
> > from (
> > SELECT REFERENCIA,FOTO1,LOCALIDAD, fecha, hora
> > FROM tabla1
> > WHERE FOTO1 != ''
> > AND ESTADO = 3
> > AND CATEGORIA IN (SELECT CODIGO FROM CATEGORIAS WHERE GRUPO=6)
> > AND DESTACADO = TRUE
> > UNION ALL
> > SELECT REFERENCIA,FOTO1,LOCALIDAD, fecha, hora
> > FROM tabla1
> > WHERE FOTO1 != ''
> > AND ESTADO = 3
> > AND CATEGORIA IN (SELECT CODIGO FROM CATEGORIAS WHERE GRUPO=6)
> > AND DESTACADO = FALSE
> > ) foo
> > ORDER BY FECHA DESC, HORA DESC LIMIT 1;
> >
>
> Por interpretar ... yo interpreto que quiere que los destacados salgan
> antes de los no destacados.
>
> Pregunta :
>
> ORDER BY DESTACADO ASC, ....
> o
> ORDER BY DESTACADO DESC, ...
>
no. porque lo esta ordenando explicitamente por fecha y hora, no por destacado
> ORDER BY FECHA DESC, HORA DESC LIMIT 1;
--
Atentamente,
Jaime Casanova
"Programming today is a race between software engineers striving to
build bigger and better idiot-proof programs and the universe trying
to produce bigger and better idiots.
So far, the universe is winning."
Richard Cook
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