Re: Another view on analysis and ER
Date: Thu, 06 Dec 2007 15:48:02 +0100
Quoth Bob Badour:
> Keys and references are logical issues and not physical issues. Physical
> issues affect only performance.
Keys are, but key /primacy/ is not. If one ignores any performance differences between a primary key and any other key (as of course one should, although it may not be possible in current SQL systems), the remaining difference is merely syntactical convenience---hardly a logical issue.
-- JonReceived on Thu Dec 06 2007 - 15:48:02 CET