On Wed, Jul 30, 2003 at 02:35:20PM -0500, Dave Dribin wrote:
> Hi, I'm having trouble with what I think should be an easy query. For
> simplicity, I will use a CD database as an example. Each CD may have
> multiple genres. Here's some sample data:
>
> Artist Title
>
> 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,
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 se
> This doesn't allow multiple genre's per CD, though, does it? A CD
> can only have 1 genre_id. I would like the ability to have multiple
> genres, in which case a third table is necessary:
>
> CREATE TABLE cd_genres (
> cd_id integer,
> genre_id integer
> );
>
> cd_id references cd.id
> On Wed, Jul 30, 2003 at 01:11:35PM -0700, Eric Clark wrote:
> > On Wed, 2003-07-30 at 12:35, Dave Dribin wrote:
> > > CREATE TABLE cd (
> > > id integer unique,
> > > artist varchar(25),
> > > title varchar(25)
> > > );
> > >
> > > CREATE TABLE cd_genres (
> > > cd_id integer,
> > > genre varchar
Dave Dribin wrote:
Hi, I'm having trouble with what I think should be an easy query. For
simplicity, I will use a CD database as an example. Each CD may have
multiple genres. Here's some sample data:
Artist Title Genres
--
On Wednesday 30 July 2003 20:35, Dave Dribin wrote:
> Hi, I'm having trouble with what I think should be an easy query. For
> simplicity, I will use a CD database as an example. Each CD may have
> multiple genres. Here's some sample data:
>
> Artist Title
On Wed, Jul 30, 2003 at 01:11:35PM -0700, Eric Clark wrote:
> On Wed, 2003-07-30 at 12:35, Dave Dribin wrote:
> > CREATE TABLE cd (
> > id integer unique,
> > artist varchar(25),
> > title varchar(25)
> > );
> >
> > CREATE TABLE cd_genres (
> > cd_id integer,
> > genre varchar
On Wed, 2003-07-30 at 12:35, Dave Dribin wrote:
> CREATE TABLE cd (
> id integer unique,
> artist varchar(25),
> title varchar(25)
> );
>
> CREATE TABLE cd_genres (
> cd_id integer,
> genre varchar(25)
> );
I think you've got this backwards. There is no advantage i
