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Database normalization
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Database normalization
Unnormalized form
(UNF)
First normal form
(1NF)
Second normal form
(2NF)
Third normal form
(3NF)
Elementary key normal form
(EKNF)
Boyce–Codd normal form
(3.5NF / BCNF)
Fourth normal form
(4NF)
Fifth normal form
(5NF / PJNF)
Domain-key normal form
(DKNF)
Sixth normal form
(6NF)
Dependencies
Functional dependency
Multivalued dependency
Join dependency
Lossless join decomposition
Temporal database
Denormalization
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