24 Jul
2007
24 Jul
'07
1:32 p.m.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Robert Douglass schrieb:
In my opinion, any time multiple parents are used it is a mistake in the data model. For example, if you have regional offices and each office has a sale, customer and advertising contact person, you might be tempted to model the data like this:
How about: Fish living in: - - salt water . shark . salmon . eel . cod - - fresh water . trout . salmon . eel . carp Cheers, Gerhard -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFGpeNafg6TFvELooQRArsHAJ9ZLyyMKxIUW25OBZFi43CQ+T5MIwCfTNxu Yhbq6xb9JMsB7XgH+HcUl48= =Xezr -----END PGP SIGNATURE-----