good books / sites on set theory

Question

I'm trying to understand E.F.Codd's "A Relational Model of Data for Large Shared Data Banks" paper.

I would like some suggestions on books / sites on set theory.

Answer 1

Wow, there should be something in the front of nearly any book on analysis or abstract algebra.

I'm fond of Halmos' Naive Set Theory, but it can be a little heavy.

Wikipedia isn't bad.

Chris Date's big database book has everything you need for Codd theory.

Answer 2

The defacto "Dragon Book Standard" on the subject is Nathan Jacobson's "Lectures In Abstract Algebra" Also not for the faint hearted.

Answer 3

I rather like the development in Applied Mathematics for Database Professionals by Lex de Haan, Toon Koppelaars. However, I already knew a fair bit about DBMS and de facto about set theory before tackling it, so maybe it isn't so good for beginning. OTOH, although it isn't for the faint of heart, neither is it impossibly dense for people who are not professional mathematicians. It is more approachable than Halmos, for example.

Answer 4

I fondly remember Enderton's "Elements of Set Theory" from my undergraduate days. This was a great read in the previous millennium. The Amazon reader reviews suggest it still is.

Answer 5

check out the papers that cite E.F. Codd's work in Google Scholar :)