Re: Proposal: 6NF
From: Aloha Kakuikanu <aloha.kakuikanu_at_yahoo.com>
Date: 3 Oct 2006 16:24:17 -0700
Message-ID: <1159917857.514539.114600_at_c28g2000cwb.googlegroups.com>
Date: 3 Oct 2006 16:24:17 -0700
Message-ID: <1159917857.514539.114600_at_c28g2000cwb.googlegroups.com>
Karen Hill wrote:
> David Cressey wrote:
>
> >
> > My phrase "a systematic way of dealing with missing data" is from Codd's
> > twelve rules. I think Codd got this one right. Not because the RDM is any
> > more dependent on dealing with missing data than any other data model might
> > be, but because, in the real world, you are going to be faced with the
> > reality that data that "ought to be there" isn't there.
>
> Here is an example:
>
> Creating an order in a table for a non-existant customer?
The problem of non-existing customer (or other data for that matter)
has been solved once and forever by
http://www.economist.com/science/PrinterFriendly.cfm?story_id=7854216
Received on Wed Oct 04 2006 - 01:24:17 CEST