Discuss the purpose of Boyce-Codd Normal Form (BCNF) and describe how BCNF differs from 3NF. Provide an example to illustrate your answer.
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BCNF is based on functional dependencies that take into account all candidate keys in a relation, however BCNF also has additional constraints compared with the general definition of 3NF given above.
Boyce–Codd normal form (BCNF) A relation is in BCNF if and only if every
determinant is a candidate key. To test whether a relation is in BCNF, we identify all the determinants and make sure that they are candidate keys.
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