Re: Entity vs. Table
From: Alan <alan_at_erols.com>
Date: Mon, 14 Jun 2004 11:05:34 -0400
Message-ID: <2j5t5nFtq4a6U1_at_uni-berlin.de>
Date: Mon, 14 Jun 2004 11:05:34 -0400
Message-ID: <2j5t5nFtq4a6U1_at_uni-berlin.de>
"Alfredo Novoa" <alfredo_at_ncs.es> wrote in message
news:40cdb944.19049702_at_news.wanadoo.es...
> On Mon, 14 Jun 2004 09:16:27 -0400, "Alan" <alan_at_erols.com> wrote:
>
>
> >You start with business requirements, which you turn into an ERD. You
then
> >follow the rules referred to above, to turn it into an actual relational
> >schema. This is the physical model.
>
> Very very wrong!!
>
> This is the logical model!
>
>
> Regards
> Alfredo
The basic divisions are:
Business Requirements
flows to
Conceptual Design (ERD or other)
flows to
Logical Design (Mapping to Relational Schema (tables))
flows to
Physical Design (Indexes, Storage Structures, and other RDBMS-independent
items)
Received on Mon Jun 14 2004 - 17:05:34 CEST