Re: Counting propositions
Date: Tue, 15 Jun 2004 13:55:58 +0100
"x" <x-false_at_yahoo.com> wrote in message news:40cecf85_at_post.usenet.com...
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> "Tony" <andrewst_at_onetel.net.uk> wrote in message
> > "x" <x-false_at_yahoo.com> wrote in message
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> > > "Paul G. Brown" <paul_geoffrey_brown_at_yahoo.com> wrote in message
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> > > > 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.
But in a relational database, all you have are propositions. There is nothing else there that counts.
Business Intelligence, IBM Global Services Received on Tue Jun 15 2004 - 14:55:58 CEST