Re: Thinking about MINUS
From: Lennart <Erik.Lennart.Jonsson_at_gmail.com>
Date: 7 Jan 2007 11:28:52 -0800
Message-ID: <1168198132.809700.36050_at_11g2000cwr.googlegroups.com>
Date: 7 Jan 2007 11:28:52 -0800
Message-ID: <1168198132.809700.36050_at_11g2000cwr.googlegroups.com>
Bob Badour wrote:
[...]
>
> Right now, we are at the level of using INTERSECT as an analog to AND.
> Join is an extension of INTERSECT, and I am not yet clear how our
> discussion extends to JOIN yet.
>
While thinking about this, I stumbled on the following article that
might be of interest:
http://en.wikipedia.org/wiki/Relation_composition
/Lennart
[...]
Received on Sun Jan 07 2007 - 20:28:52 CET