>
> On Wed, Jul 30, 2003 at 05:26:23PM -0400, Dmitry Tkach wrote:
> > >How do I write a query to find all CDs that are NOT Rock?
> > >
> > What about
> > select * from cd where not exists (select 1 from cd_genres where
cd_id
> > = cd.id and genre='Rock')?
>
> Thanks everyone! This did indeed work, and it does seem clearer. I
> never knew about EXISTS before. How portable is this? I'm interested
> in supporting PostgreSQL and MS SQL Server for now, and possibly
> Oracle and MySQL in the future.
>
It should be portable completely. It's SQL standard.
Regards, Christoph