Re: DB required to list multiple D.I.V.O.R.C.E.S. & Re-marriages
From: David Cressey <david_at_dcressey.com>
Date: Fri, 21 Dec 2001 13:25:53 GMT
Message-ID: <BLGU7.39$Fy.2157_at_petpeeve.ziplink.net>
Received on Fri Dec 21 2001 - 14:25:53 CET
Date: Fri, 21 Dec 2001 13:25:53 GMT
Message-ID: <BLGU7.39$Fy.2157_at_petpeeve.ziplink.net>
> Don't you just love NULLs
I remember the "Much Ado about nothing"
thread in this NG, a while back.
In a fully normalized database, there is no
need for NULLS. Every NULL can be construed as the consequence of an outer
join between more elementary tables.
I contend that a mathematical RELATION has no
nulls. If you accept that, if follows that NULLS are a divergence between
Relational algebra and the relational model of data. Ducking!