Re: Little design mistakes that can be easily avoided (2): Listenning to CELKO (and CELKO alikes)

Jon Heggland <jon.heggland_at_idi.ntnu.no> wrote:

[snip]

>It is /always/ a superkey. It might be "candidate" (i.e. irreducible) as
>well; if not, it is a /proper superkey/. (Also, a tuple is not a key,
>but I'll quibble about that some other time:)

     Why can't a tuple be a key? It does uniquely specify a tuple.

Sincerely,

Gene Wirchenko

Computerese Irregular Verb Conjugation:

     I have preferences.
     You have biases.
     He/She has prejudices.