Re: By The Dawn's Normal Light

On Mon, 25 Oct 2004 10:01:17 +0200, "Ja Lar" <jalar_at_nomail.com> wrote:

>> Candidate keys are at the logical level.
>>
>Yes, but "table" is not.

In the context you were talking of course it is.

A logical SQL table represents a relation if and only if it does not have nulls nor duplicate tuples.

Physical tables are out of the user's view.

Regards Received on Mon Oct 25 2004 - 11:46:28 CDT