Re: compound propositions

From: paul c <toledobythesea_at_oohay.ac>
Date: Thu, 18 Mar 2010 17:31:22 GMT
Message-ID: <Krton.68449$Db2.27229_at_edtnps83>

Bob Badour wrote:
> paul c wrote:
>
>> David BL wrote:
>> ...
...

>> A relation satisfies one or more predicates when its attribute names

>
> How do you figure "or more" ?
> ...

A database with the single attribute 'suppliers' might refer to every supplier in the world or only the suppliers in the northwest, whatever 'northwest' means.

Seems an important kind of leverage though I don't know how often it's been exploited, eg., the same database could form part of both applications. Received on Thu Mar 18 2010 - 18:31:22 CET

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