Re: Another view on analysis and ER

From: Bob Badour <>
Date: Thu, 06 Dec 2007 09:57:37 -0400
Message-ID: <4757ffd2$0$5257$>

Jon Heggland wrote:

> Quoth Bob Badour:

>>David Cressey wrote:
>>>This could have consequences for performance,  ease of
>>>programming,  "natural joins" etc. etc.
>>Performance is independent of choices at the logical level of discourse
>>where one identifies candidate keys or designates primary keys.

> Minor point: Is designation of primary keys really at the logical level?


> Are there any substantial logical consequences?

The preponderance of foreign key references will refer to the primary key when one designates a primary key. Received on Thu Dec 06 2007 - 14:57:37 CET

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