Re: Counting propositions
Date: 15 Jun 2004 03:22:18 -0700
"x" <x-false_at_yahoo.com> wrote in message news:<40ce9db7_at_post.usenet.com>...
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> "Paul G. Brown" <paul_geoffrey_brown_at_yahoo.com> wrote in message
> > Given that all relvars have a key, and assuming that your '*' is a
> > macro that expands to 'all attributes' (don't matter what phase of
> > query processing), then nr is going to equal the number of tuples in
> > the relvar.
> Ok. But why there is a need to know this number ?
> It is like saying "today I made 100 affirmations".
Have you never wanted to know how many of something you had? Can you not envisage a large business wanting to know, for example, how many employees it has? Received on Tue Jun 15 2004 - 12:22:18 CEST