Page "Database normalization" Paragraph 3

Edgar F. Codd, the inventor of the relational model, introduced the concept of normalization and what we now know as the First Normal Form ( 1NF ) in 1970.

Codd went on to define the Second Normal Form ( 2NF ) and Third Normal Form ( 3NF ) in 1971, and Codd and Raymond F. Boyce defined the Boyce-Codd Normal Form ( BCNF ) in 1974.

Informally, a relational database table is often described as " normalized " if it is in the Third Normal Form.

Most 3NF tables are free of insertion, update, and deletion anomalies.