Re: Counting propositions
Date: Mon, 14 Jun 2004 10:57:40 -0700
"Laconic2" <laconic2_at_comcast.net> wrote in message
> "x" <x-false_at_yahoo.com> wrote in message news:40cd9b6a_at_post.usenet.com...
> > If tuples in a relational relation(ship) (or relvar) are propositions,
> > is the meaning of :
> > select count(distinct *) as nr
> > from <relvar>
> > and the like ?
> Before dealing with your question, we have to decode the intent behind
> In particular, when does the wildcard get expanded to the list of all the
> columns? At compile time? at execution time?
> It makes a difference.
Why does it make a difference? Exotic operators aside (e.g. Pivot by Microsoft), could you give an example, simple select-project-join preferrably? Received on Mon Jun 14 2004 - 19:57:40 CEST