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Define the Boyce-Codd Normal Form with instance and also Compare BCNF and 3NF.
Ans: BCNF: For each functional dependency X->Y in a set F of functional dependencies over relation R, either:
3NF: For each functional dependency X->Y in a set F of functional dependencies over relation R, either:
a. there is no subset of a key is a key
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why three level architecture had been developed/
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