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From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no>
To: Stephan Szabo <sszabo@megazone.bigpanda.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: Existential quantifier
References: <86bpkgqiv8.fsf@ds4.des.no>
	<20091009160318.J80119@megazone.bigpanda.com>
Date: Sat, 10 Oct 2009 01:54:21 +0200
In-Reply-To: <20091009160318.J80119@megazone.bigpanda.com> (Stephan Szabo's
	message of "Fri, 9 Oct 2009 16:06:56 -0700 (PDT)")
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Stephan Szabo <sszabo@megazone.bigpanda.com> writes:
> Not at all tested as I don't have access to my db right now, but I think
> something like one of these would work:
>
> select fs.film.title, fs.film.year
>  from fs.film
>  where exists(select 1 from fs.star where fs.film.id =3D fs.star.film
>   and fs.star.last =3D 'Sheen');

Ah, that was exactly what I was looking for.

> select fs.film.title, fs.film.year
>  from fs.film
>  where fs.film.id in (select fs.star.film where fs.star.last =3D 'Sheen');

ITYM

select fs.film.title, fs.film.year
 from fs.film
 where fs.film.id in (
   select fs.star.film from fs.star where fs.star.last =3D 'Sheen'
 );

(missing FROM)

DES
--=20
Dag-Erling Sm=C3=B8rgrav - des@des.no