Date: Fri, 02 Nov 2007 14:59:16 GMT
paul c wrote:
> The relvars and keys example might be a little more interesting than
> mine. I'd say this is because D&D emphasize that an empty header can be
> a key. But if it is, then there would be only one tuple for a given
> relation that has an empty RVA, no other tuples for that RVA. ...
Oops, should have said ",no other tuples about that relation's keys". Received on Fri Nov 02 2007 - 15:59:16 CET