Or use an outer join with "where members.list_id is null", as was
mentioned on the list earlier today.
--Walt
> -----Original Message-----
> From: Martijn Tonies [mailto:m.tonies@stripped]
> Sent: Friday, February 06, 2004 3:18 PM
> To: mysql@stripped
> Subject: Re: A challenge I think
>
>
> Hi,
>
> > Using MySQL 4x
> > I have two tables
> > Lists and members
> > Now for every list that a member is a member of there is
> list ID in the
> > members table so to query a members lists I would do the following
> > SELECT members.EmailAddr, members.ListID
> >
> > FROM members INNER JOIN lists ON members.ListID = lists.ListID
> > WHERE (((members.EmailAddr)="john_berman@stripped"));
>
> Loose the parenthesis - no need.
>
> > So I get say
> > John_berman@blueyonder 3
> > John_berman@blueyonder 2
> > John_berman@blueyonder 44
> >
> > And it works fine, but now I want to find which lists I'm
> not a member of
> > and would appreciate some help.
>
> select l.listid from lists l where l.listid not in (select
> m.listid from
> members m
> where m.emailaddr = 'john_berman@stripped')
>
> With regards,
>
> Martijn Tonies
> Database Workbench - developer tool for InterBase, Firebird,
> MySQL & MS SQL
> Server.
> Upscene Productions
> http://www.upscene.com
>
>
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