Re: Nulls, integrity, the closed world assumption and events
From: Neo <neo55592_at_hotmail.com>
Date: 16 Jan 2007 11:36:57 -0800
Message-ID: <1168976217.486384.53080_at_q2g2000cwa.googlegroups.com>
Date: 16 Jan 2007 11:36:57 -0800
Message-ID: <1168976217.486384.53080_at_q2g2000cwa.googlegroups.com>
> I have changed my mind on a lot of things since posting here
> originally. But so far you are right that I haven't seen the proof
> that I should want to move from NF2 to 1NF...
I may have missed the explanation above, if initially john has no cars, tom has two cars, and bob has one; how does the MV solution later handle each car having 0 to many manfacturers?
Because dbd's data model is very general, systematic, normalized, holy,
etc; one simply adds those attributes like this:
(new gm 'mfg)
(set (. 'aston 'martin) mfgdBy honda)
(new honda 'mfg)
(set (. 'aston 'martin) mfgdBy gm)
Received on Tue Jan 16 2007 - 20:36:57 CET