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Re: many to many relationship

From: john <nospam_at_nospam.com>
Date: Thu, 6 Mar 2003 13:47:38 -0000
Message-ID: <zmI9a.10436$Vx2.799976@wards>


so the physical model maps the real world and the conceptual model is the normalized model of the physical model?

"Pablo Sanchez" <pablo_at_dev.null> wrote in message news:Xns93364299438C0pingottpingottbah_at_216.166.71.233...
> "Paul Vernon" <paul.vernon_at_ukk.ibmm.comm> wrote in news:b478s6$1h5m$2
> @sp15at20.hursley.ibm.com:
>
> > All of which is an argument against the usefulness of the ER model's
> > many-to-many relationships idea. In this case, was the ER model
> > clearer without an explicit 'enrollement' entity?
>
> FWIW,
>
> I always go directly to the physical model. After all, the folks who
> typically consume the model are developers. The businessness folks do
> the 'sign-off' and they're easily 'trained' to read the physical
> model. :)
> --
> Pablo Sanchez, High-Performance Database Engineering
> http://www.hpdbe.com
Received on Thu Mar 06 2003 - 07:47:38 CST

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