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Re: Smart Database Tricks

From: Jan Hidders <hidders_at_gmail.com>
Date: Fri, 22 Jun 2007 12:15:08 -0000
Message-ID: <1182514508.151011.57480@w5g2000hsg.googlegroups.com>


On 22 jun, 01:36, Bob Badour <bbad..._at_pei.sympatico.ca> wrote:
> Jan Hidders wrote:
> > On 21 jun, 21:17, vldm10 <vld..._at_yahoo.com> wrote:
>
> >>On Jun 18, 7:41 pm, Jan Hidders <hidd..._at_gmail.com> wrote:
>
> >>>On 18 jun, 20:59, vldm10 <vld..._at_yahoo.com> wrote:
>
> [snip]
>
> >>>If this is a relation then
> >>>all columns are attributes and since you have represented all the
>
> >>Can you please, tell me what is the definition of the attribute in RM.
>
> > It's a column of a relation. Conceptually it represent the role in the
> > predicate that is represented by the relation.
>
> Is an attribute a predicate variable of some sort?

As in "the x in predicate P(x, y) "? Yes, I'd say that is the same thing.

Received on Fri Jun 22 2007 - 07:15:08 CDT

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