Edgar (Ted) Codd, the mathematician and former IBM Fellow best known for creating the relational model for representing data that led to todays $12 billion database industry, died Friday, April 18, at his home in Florida at age 79.

Compare ISAM databases to relational databases.

The mathematician laid the theoretical foundation for the standard method by which information is organized in and retrieved from computers. The New York Times A CNET article by , . Published on April 23, 2003 7:10 AM PDT.

Laurent AUDIBERT - Base de Données et langage SQL ; bases de données ; schéma entités-associations ; SQL ; algèbre relationnelle ; normalisation ; schéma relationnel ; SQL intégré ; expressions régulières

Information is a valuable resource to an organization. Computer software provides an efficient means of processing information, and database systems are becoming an increasingly common means by which it is possible to store and retrieve information in an effective manner. This book provides comprehensive coverage of fundamentals of database management systems. This book is for those who wish a better understanding of relational data modeling, its purpose, its nature, and the standards used in creating relational data models.