15.00 - The Relational Model for Database Management - Teradata Database

Teradata Database Design

Teradata Database
User Guide

The Relational Model for Database Management

After E.F. Codd introduced the relational model for database management in 1969, a number of alternative models immediately began to appear in the literature. The usual justification given for introducing these new models was a perceived failure of the relational model to capture sufficient data semantics. The failure of the original relational model to capture a satisfactory level of data semantics was acknowledged by Codd himself, who has extended the model several times in an attempt to better capture data semantics, most famously in his
RM/T paper (Codd, 1979). This effort has even led to a second version of the relational model, which is presented in his book
The Relational Model for Database Management, Version 2 (Codd, 1990).