Re: Entity vs. Table
Date: Mon, 14 Jun 2004 17:30:21 +0300
- Post for FREE via your newsreader at post.usenet.com ****
"Alan" <alan_at_erols.com> wrote in message
> ----- Original Message -----
> From: "Alfredo Novoa" <alfredo_at_ncs.es>
> Newsgroups: comp.databases.theory
> Sent: Monday, June 14, 2004 9:27 AM
> Subject: Re: Entity vs. Table
> > "Alan" <alan_at_erols.com> wrote in message
> > > It's not a requirement, but it is a starting point. If you start with
> > > physical model, you can denormalize for the sake of performance.
> > Physical designs can't be 3NF. Normalization only applies to the
> > logical level.
> I am talking about an implementation of a 3NF logical design in a physical
> model. I didn't state it clearly.
I think the misunderstanding come from the term "physical model". I think Alan consider a table part of the "physical model" and a relvar a part of the "logical model" on paper, not in the computer.
As if mathematical logic cannot be computerized ...
- Usenet.com - The #1 Usenet Newsgroup Service on The Planet! *** http://www.usenet.com Unlimited Download - 19 Seperate Servers - 90,000 groups - Uncensored -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=