Re: teaching relational basics to people, questions
From: paul c <toledobythesea_at_oohay.ac>
Date: Wed, 02 Dec 2009 00:12:38 GMT
Message-ID: <WhiRm.55969$PH1.37804_at_edtnps82>
>
> Ahem. Conjunction of the domains. A relation is the extension of a
> predicate. That predicate can be represented as the disjunction of the
> tuples.
> ...
Date: Wed, 02 Dec 2009 00:12:38 GMT
Message-ID: <WhiRm.55969$PH1.37804_at_edtnps82>
Bob Badour wrote:
...
>> The conventional view is that is that the information in a table is >> the logical conjunction of the information represented by the rows in >> the table. Just because the table is formed by a summing operation >> doesn't change that.
>
> Ahem. Conjunction of the domains. A relation is the extension of a
> predicate. That predicate can be represented as the disjunction of the
> tuples.
> ...
Yes, yes and yes, thanks. Maybe I was a bit clumsy. Still, once people start talking about propositions, I have to note that any two tuples in a relation are conventionally treated as if the ones they represent are both true. Received on Wed Dec 02 2009 - 01:12:38 CET