Re: Basic question?What 's the key if there 's no FD(Functional Dependencies)?

saturnlee_at_yahoo.com wrote:
> What 's the key for it? ABC or nothing???

ABC is not the key.
Example: Let one partricular entity has A,B,C atributes and let these atributes take the following values:

    A B C

    2        4          6
    8        4          6
    2        4          6

( ABC can be the key only in the trivial cases i.e if an entity has the atributes whose values never change) Received on Wed Nov 01 2006 - 11:44:58 CST