Intelligent Enterprise

Dr. Edgar F. Codd: Passing of a Pioneer
On April 18, the inventor of the relational model of data -- the fundamental concept behind today's multibillion-dollar relational database industry -- died at his home in Williams Island, Fla. C. J. Date offers an appreciation.
by C. J. Date
April 25, 2003

Mutability
Are mutators necessary?
by C.J. Date
March 27, 2001

Polymorphism and Substitutability
A look at the fundamental mechanisms for achieving code reuse
by C. J. Date
February 9, 2000

Thirty Years of Relational: Relational Forever!
The relational model will stand the test of time
by C.J.Date
June 22, 1999

Thirty Years of Relational: Extending the Relational Model
When's an extension not an extension?
by C. J. Date
June 01, 1999

Thirty Years of Relational: Relational Really Is Different
An analysis of Codd's contribution to the Great Debate
by C.J. Date
May 11, 1999

Thirty Years of Relational: The First Three Normal Forms, Part 2
A concluding look at Codd's normalization ideas
by C.J. Date
April 20, 1999

Thirty Years of Relational: The First Three Normal Forms
The beginnings of relational dependency theory
by C. J. Date
March 30, 1999

Data Sublanguage Alpha, Installment 7
Concluding our brief look at Codd's Alpha language
by C. J. Date
March 09, 1999