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Which forms has a relation that possesses data about an individual entity:Options5NF3NF2NF4NF

Question

Which forms has a relation that possesses data about an individual entity:Options5NF3NF2NF4NF

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Solution

The forms that a relation possessing data about an individual entity can have are:

  1. 2NF (Second Normal Form): A relation is in 2NF if it is in 1NF and every non-prime attribute of the relation is fully functionally dependent on any candidate key of the relation.

  2. 3NF (Third Normal Form): A relation is in 3NF if it is in 2NF and no non-prime attribute of the relation is transitively dependent on any candidate key of the relation.

  3. 4NF (Fourth Normal Form): A relation is in 4NF if it is in Boyce-Codd Normal Form (BCNF) and it has no multi-valued dependencies.

  4. 5NF (Fifth Normal Form or Project-Join Normal Form): A relation is in 5NF if it is in 4NF and every join dependency in the relation is implied by the candidate keys of the relation.

These are the forms a relation can have when it possesses data about an individual entity.

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