Re: Does Codd's view of a relational database differ from that of Date & Darwin? [M.Gittens]

Paul wrote:
> Jan Hidders wrote:

>> [...] But that's not the only way to model partial information w/o
>> null values and in many cases the worst way to do it.

Yes. But note that the "better" should be a qualified term here. As always it depends upon many factors whether this is really better or not.

> Are there other methods?

Probably. But I think these are the most important ones.

> Why is the "special values in the domain" method inferior to other
> methods?

Do you always ask that many questions? :-) On this matter I largely agree with Chris Date's position, so I will refer you to his writings.

• Jan Hidders