Home | Previous Page | Next Page   Basics of Database Design and Implementation > Building a Relational Data Model > Normalizing a Data Model >

Summary of Normalization Rules

The following normal forms are discussed in this section:

When you follow these rules, the tables of the model are in the third normal form, according to E. F. Codd, the inventor of relational databases. When tables are not in the third normal form, either redundant data exists in the model, or problems exist when you attempt to update the tables.

If you cannot find a place for an attribute that observes these rules, you have probably made one of the following errors:

Home | [ Top of Page | Previous Page | Next Page | Contents | Index ]