Re: Basic question?What 's the key if there 's no FD(Functional Dependencies)?

paul c wrote:
...
> Never had a Civic but all my Honda two-wheelers had unique serial
> numbers. None of them had all the same attributes but if they had, I
> would have made up my own serial numbers. I believe Codd called this
> the information principle. Without it, some applications are
> impossible, such as the one you are making up. I believe this is called
> a straw man.

I think a corollary of the IP might be "you can't apply information you don't have".

p Received on Fri Nov 03 2006 - 08:54:56 CST