Re: The Practical Benefits of the Relational Model

From: Lauri Pietarinen <lauri.pietarinen_at_atbusiness.com>
Date: Thu, 17 Oct 2002 11:42:35 +0300
Message-ID: <3DAE77FB.3ECA6486@atbusiness.com>

>
> > The latest article in www.dbdebunk.com (By Date and McGovern)
> > might shed light to that problem.
> >
> > They state that it is a bad idea to have tables whose
> > meanings overlap and clearly that is the case with A and B.
> >
> > On the other hand C says that their meaning does not
> > overlap so hence the contradiction and the refusal of
> > D4 to insert anything anywhere.
>
> [I'm not sure what C is referring to in this paragraph]

Uh, sorry! I implicitely gave the view the name 'C', so

C = (A UNION B) MINUS (A INTERSECT B) Lauri Received on Thu Oct 17 2002 - 03:42:35 CDT