Re: Proposal: 6NF

"Bob Badour" <bbadour_at_pei.sympatico.ca> wrote in message news:6M6Vg.656$cz.9617_at_ursa-nb00s0.nbnet.nb.ca...
> David Cressey wrote:
>
> > "David Cressey" <dcressey_at_verizon.net> wrote in message
> > news:F4uTg.998$rH1.633_at_trndny05...
> >
> >>First, let's find out where we all agree, then work our way towards
where
> >>there are different viewpoints.
> >>
> >>Here's a starter: A schema in DKNF will have no nullable columns.
> >
> > I got no answers to the first point, but I think we all agree.
> >
> > Here's the next point.
> >
> > An outer join between two relational tables will, in general, produce a
> > table with nullable columns.
> >
> > Note: Brian Selzer has carried this point further in another subthread.
>
> You are begging the question.

I'm not sure which question I'm begging.

Please note that I did NOT assert that outer join is a relational operation or that the result of an outer join is a relational table. Received on Fri Oct 06 2006 - 13:21:16 CEST