From: | Dag-Erling Smørgrav <des(at)des(dot)no> |
---|---|
To: | Stephan Szabo <sszabo(at)megazone(dot)bigpanda(dot)com> |
Cc: | pgsql-sql(at)postgresql(dot)org |
Subject: | Re: Existential quantifier |
Date: | 2009-10-09 23:54:21 |
Message-ID: | 86vdiop1hu.fsf@ds4.des.no |
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Lists: | pgsql-sql |
Stephan Szabo <sszabo(at)megazone(dot)bigpanda(dot)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 = fs.star.film
> and fs.star.last = '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 = '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 = 'Sheen'
);
(missing FROM)
DES
--
Dag-Erling Smørgrav - des(at)des(dot)no
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