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Re: Please help me with Relational Database design

From: <_at_s>
Date: Thu, 6 Mar 2003 09:40:36 +0100
Message-ID: <b471ie$gfu$1@news2.tilbu1.nb.home.nl>


"Jan Hidders" <jan.hidders_at_REMOVE.THIS.ua.ac.be> wrote :
> Because of reflexivity we can always, i.e., no matter what other FDs we
> already derived, add:
>
> (3) BC -> B

Ah I see.
Step 3 was the step I didn't understand. But this one is true because B is a subset of BC, isn't it?
Like I said, it is very easy to see it when it's already solved. But when I have to do it myself...
Well, when I come across new problems, I'll post it right here, ok?

Thanx!
@s Received on Thu Mar 06 2003 - 02:40:36 CST

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