Re: A Logical Model for Lists as Relations

From: David Cressey <dcressey_at_verizon.net>
Date: Thu, 11 May 2006 12:09:50 GMT
Message-ID: <iQF8g.6198$re6.4713_at_trndny04>


"Jay Dee" <ais01479_at_aeneas.net> wrote in message news:Tjx8g.34028$P2.3888_at_tornado.ohiordc.rr.com...
> > If one has a numeric index that differs for each tuple, one never has
> > duplication. If one has duplication, one wonders how to refer to the
> > duplicates. As Codd observed long ago, once one has said a thing is
> > true, what does saying it again achieve?
>
> Yes, I agree. If one were, for example, compiling a list of what
> folks were going to bring to the picnic, it might be nice to know
> that potato salad had been recorded many more times than fried
> chicken...

That's counting, not asserting. Asserting something twice is no more consequential than asserting it once. Received on Thu May 11 2006 - 14:09:50 CEST

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