2 of 2 people found the following review helpful
on 1 October 2009
This book should be required reading for anyone developing database systems. It clearly explains the sound theorethical foundation of Codd's Relational Model. It should be obvious whilst reading, that the book is more like a specification than an abstract treatise. Having understood the theory, it enables the reader to understand the whys and why nots of many database implementations. The like of Oracle, Ingres, Sybase et al owe a tremendous debt to ole Edgar .
In an age when so much IT seems to the rapid implementation of fashionable ideas, its refreshing to see that databases have a very solid mathematical foundation, and therefore almost like a theorem, will endure.
Before Codd there were network and hierarchial databases. The relational model was a revolution but a quiet one given its simplicity. Later came OO databases which Codd deals with in the book. Latterly we have XML databases. Read this book and you'll understand why relational will be the only enduring model.
Quite an easy book to read, and written to inform rather than impress.