|
|
Posted by Tim Van Wassenhove on 05/14/06 19:08
On 2006-05-14, Toby Inkster <usenet200605@tobyinkster.co.uk> wrote:
> Any field, or combination thereof, that will never be null and where
> values will always be unique in a particular table is a "candidate key".
> Any candidate key can be chosen to be the primary key.
<nitpicking>
If each entity can be uniquely identified via it's properties a and b, then each
entity can also be uniquely identified by it's properties a, b and c.
So i would say: any 'minimal' candidate key can choosen as primary key.
</nitpicking>
--
Met vriendelijke groeten,
Tim Van Wassenhove <http://timvw.madoka.be>
Navigation:
[Reply to this message]
|