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Joe Celko's SQL for Smarties, 5th Edition by Joe Celko

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Chapter 5

Normalization

Abstract

Normal forms are how we set up correct relations among tables in RDBMS.

Keywords

Normal forms

Dr. E.F. Codd

Codd's 12 rules

First Normal Form (1NF)

Second Normal Form (2NF)

Third Normal Form (3NF)

Elementary Key Normal Form (EKNF)

Boyce-Codd Normal Form (BCNF)

Fifth Normal Form (5NF)

Domain-Key Normal Form (DKNF)

Non-Normal Form Redundancy

Attribute Splitting

The Relational Model and the Normal Forms of the Relational Model were first defined by Dr. E.F. Codd (1970) then extended by other writers after him. He invented the term “normalized relations” by borrowing from the political jargon of the day. A branch of mathematics called relations deals with mappings among sets defined by predicate calculus from formal logic. Just as ...

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