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Third normal form facts for kids

Kids Encyclopedia Facts

Third normal form (3NF) is a property of a relational model, specifically tables that is a criterion of database normalization.

The first criterion of being third normal form is that the table be second normal form.

Within a table that is in third normal form, the data in each column in each row are dependent only on columns that are part of the primary key. A primary key is one or more columns in a row that is used to identify and index that row of the table. Columns that are not related to any column in the primary key are removed.

See also

Kids robot.svg In Spanish: Tercera forma normal para niños

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