Primary-key ... alternate key ... (newbie question)
From: joske_at_home <xvandenberge.j_at_village.uunet.be>
Date: Thu, 03 Oct 2002 19:10:16 GMT
Message-ID: <sC0n9.144230$8o4.21399_at_afrodite.telenet-ops.be>
Hi to all,
Date: Thu, 03 Oct 2002 19:10:16 GMT
Message-ID: <sC0n9.144230$8o4.21399_at_afrodite.telenet-ops.be>
Hi to all,
In many normalisation articles, they sometimes mention to mark the alternate
key's.
Why is it important to 'mark' these? Where are they used during the
normalisation-steps?
If you choose for a certain combination of attributes as a primary key, does
the other attributes, (that are part of the alternate key), influence the
normalisation process?
Regards,
Jos
Received on Thu Oct 03 2002 - 21:10:16 CEST