Re: 4NF is Where It Is At! [WAS Re: 1:1 relationships]

Peter Franklin wrote:
> I have been watching this thread hoping to be enlightened as to what
> 4NF actually is, as I have never been able to understand Date's
> definition. All the time I couldn't see where this example differed
> from "plain good old 3NF", but put this down to my stupidity.
>
> Thank you, Jan :-)

You're welcome. :-) And if you have any questions about 4NF I will be quite happy to answer them. The problem is usually understanding what exactly is a multi-valued dependency. I think I already gave a formal definition earlier in this thread. Would you like a small example?

-- 
  Jan Hidders