Alban Hertroys haram...@gmail.com wrote:
Unfortunately, I do not own a copy so I can't verify. If anyone
who does own a copy could confirm or even quote the relevant
section, that would be great.
I have a copy of The RELATIONAL MODEL for DATABASE MANAGEMENT,
VERSION 2 (RM/V2), by E. F. Codd,
The theory got me intrigued. google
(http://en.wikipedia.org/wiki/Codd%27s_12_rules) says:
rule 3: systematic treatment of null values; hmmm this is a little
broader then support for null. I would think, that:
1. if a sequence of update XX set fk_field=null; then delete YY depending
On Sun, 2015-01-25 at 14:09 +0100, Alban Hertroys wrote:
The theory got me intrigued. google
(http://en.wikipedia.org/wiki/Codd%27s_12_rules) says:
rule 3: systematic treatment of null values; hmmm this is a little
broader then support for null. I would think, that:
1. if a
