Re: Relational Algebra Dilemma - Urgent.

"Sted Alana" <Sted_Alana_at_hotmail.com> wrote in message news:<3cda1610_1_at_news.iprimus.com.au>...
> Hi,
>
> Im trying to convert an SQL query into relational form, but I am stuck when
> trying to write WHERE EXISTS in relational.
>
> I know that 'WHERE NOT EXISTS' is simply written as a minus sign (-).
>
> Any help appreciated.

Try intersection. Everything is join eventually;-) Received on Thu May 09 2002 - 11:25:54 CDT