Re: Another view on analysis and ER
Date: Thu, 06 Dec 2007 15:16:56 +0100
Quoth Bob Badour:
> Jon Heggland wrote:
>> Are there any substantial logical consequences?
> The preponderance of foreign key references will refer to the primary
> key when one designates a primary key.
Granted, but it will be explicit which key a foreign key refers to (or it will be implicitly given by the attribute names in the foreign key). Primary key designation is neither necessary nor sufficient for this.
-- JonReceived on Thu Dec 06 2007 - 15:16:56 CET