Re: The wisdom of the object mentors (Was: Searching OO Associations with RDBMS Persistence Models)
Date: Tue, 20 Jun 2006 11:46:38 -0400
On 2006-06-08 09:19:21 -0400, "Erwin" <e.smout_at_myonline.be> said:
> You seem to be obviously ignorant of the fact that duplicate "rows" (as
> you call them) are indeed very much ruled out by the relational model.
I am familiar with CNF3 (and maybe I could remember 4) but am struggling with the fact that I distinctly remember being able to add duplicate rows to a table. Perhaps the DBMS was just flawed, or perhaps some DBMSs allow this, or perhaps my memory is just fouled up and the schema had some kind of instance-id in it.
-- Robert C. Martin (Uncle Bob) | email: unclebob_at_objectmentor.com Object Mentor Inc. | blog: www.butunclebob.com The Agile Transition Experts | web: www.objectmentor.com 800-338-6716 |Received on Tue Jun 20 2006 - 17:46:38 CEST