Re: Please help me with Relational Database design
From: _at_s <edstasy_at_*nospam*home.nl>
Date: Wed, 5 Mar 2003 22:55:44 +0100
Message-ID: <b45rp4$ff9$1_at_news1.tilbu1.nb.home.nl>
Date: Wed, 5 Mar 2003 22:55:44 +0100
Message-ID: <b45rp4$ff9$1_at_news1.tilbu1.nb.home.nl>
Well, I hoped that the Greek letters worked, but it didn't. Please fill in
for the questiomarks:
A -> B |- AC -> B
Thanx!
"_at_s" <edstasy@*nospam*home.nl> wrote in message
news:b45rin$c83$1_at_news1.tilbu1.nb.home.nl...
> Hello,
>
> I have an exam in Relational Database design in a few weeks, and I can't
> find out how to use the Armstrong Axioms.
> These are reflexivity, augmentation and transitivity.
> It looks
> For example, how can I proof (with Armstrong):
> ? -> ? |- ?? -> ?
>
> It looks very easy, but I can't find out how exactly it works.
>
> Hope you can help me.
> Thanx,
>
> _at_s
>
>
Received on Wed Mar 05 2003 - 22:55:44 CET