Re: By The Dawn's Normal Light

From: Alfredo Novoa <alfredo_at_ncs.es>
Date: Mon, 25 Oct 2004 16:46:28 GMT
Message-ID: <417d2dd2.21495140_at_news.wanadoo.es>

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 - 18:46:28 CEST

This message: [ Message body ]
Next message: Marshall Spight: "Re: Call for an API standard for SQL statements"
Previous message: Alfredo Novoa: "Re: By The Dawn's Normal Light"
Maybe in reply to: Laconic2: "By The Dawn's Normal Light"
Next in thread: Marshall Spight: "Re: Call for an API standard for SQL statements"
Reply: Ja Lar: "Re: By The Dawn's Normal Light"

Contemporary messages sorted: [ by date ] [ by thread ] [ by subject ] [ by author ]

Original text of this message