Re: By The Dawn's Normal Light
Date: Sat, 23 Oct 2004 07:26:44 -0400
Message-ID: <Ie2dnZ0AwvCc3efcRVn-jQ_at_comcast.com>
"Alfredo Novoa" <alfredo_at_ncs.es> wrote in message
news:e4330f45.0410221621.3eac8eb9_at_posting.google.com...
> "Ja Lar" <jalar_at_nomail.com> wrote in message
news:<clalor$po7$1_at_news.net.uni-c.dk>...
>
> > > A table represents a set if and only if there is a candidate key.
> > You are moving the concept of normal form from the logical level to the
> > physical level.
>
> Why?
>
> Candidate keys are at the logical level.
>
In "zero normal form" (a whimsical name, in case you didn't notice) I am
trying to link the physical level, represented by tables, to the logical
level, represented by relations.
If I think in relations, but I build in tables, I need some kind of link.
That's precisely the situation I found myself in back in the 1980s and 1990s. Received on Sat Oct 23 2004 - 13:26:44 CEST