Third normal form (3NF) is a level of database normalization defined by English computer scientist Edgar F. Codd. A relation (or table, in SQL) is in third normal form if it is in second normal form and also lacks non-key dependencies, meaning that no non-prime attribute is functionally dependent on (that is, contains a fact about) any other non-prime attribute.
Third normal form (3NF) is a level of database normalization defined by English computer scientist Edgar F. Codd. A relation (or table, in SQL) is in third normal form if it is in second normal form and also lacks non-key dependencies, meaning that no non-prime attribute is functionally dependent on (that is, contains a fact about) any other non-prime attribute.
Source: Wikipedia "Third normal form" · CC BY-SA 4.0
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