Re: Please help me with Relational Database design
Date: 6 Mar 2003 10:43:21 +0100
>"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...
Yet that is really the only way to learn it.
Great! But since this newsgroup is not a homework-service you should not forget to show to us that you made a serious effort to solve it yourself, and not be disappointed if all you get is a hint. You will learn more that way.
- Jan Hidders