Re: Counting propositions

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"Tony" <andrewst_at_onetel.net.uk> wrote in message news:c0e3f26e.0406150222.fe2eea5_at_posting.google.com... > "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
> > news:57da7b56.0406141517.9cb7b7d_at_posting.google.com...
> > > 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?

Employees yes. Propositions no.

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