Re: where clause question

you'll need to create an alias beforehand

SELECT foo.foo_id, foo.name
FROM foo, (SELECT * FROM foo, bar WHERE ...) bar
WHERE foo.bar_id = bar.bar_id
AND bar.name = 'martini';

Martin Gainty
______________________________________________
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> Date: Fri, 4 Sep 2009 10:21:24 -0700
> From: david@fetter.org
> To: leknarf@pacbell.net
> CC: pgsql-general@postgresql.org
> Subject: Re: [GENERAL] where clause question
>
> On Fri, Sep 04, 2009 at 06:47:24AM -0700, Scott Frankel wrote:
> >
> > Hello,
> >
> > Is it possible to perform selects in a where clause of a statement?
> >
> > Given a statement as follows:
> >
> > SELECT foo.foo_id, foo.name
> > FROM foo, bar
> > WHERE foo.bar_id = bar.bar_id
> > AND bar.name = 'martini';
> >
> > I'm looking for a way to recast it so that the select and from clauses
> > refer to a single table and the join referencing the second table occurs
> > in the where clause. For example, something like this:
> >
> > SELECT foo.foo_id, foo.name
> > FROM foo
> > WHERE (SELECT * FROM foo, bar WHERE ...)
> > foo.bar_id = bar.bar_id
> > AND bar.name = 'martini';
> >
> > I've explored the "where exists" clause, but it's not supported by the
> > application toolkit I'm using. AFAIK, I've only got access to where ...
>
> Sounds like a great reason to modify, or if you can't modify, replace,
> that application toolkit. This won't be the last time it will get in
> your way.
>
> Cheers,
> David.
> --
> David Fetter <david@fetter.org> http://fetter.org/
> Phone: +1 415 235 3778 AIM: dfetter666 Yahoo!: dfetter
> Skype: davidfetter XMPP: david.fetter@gmail.com
>
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