Question

What is meant by the closure of a set of functional dependencies illustrate with an example

Answer 1

The term "The Closure of Functional Dependency" means a complete set of many characteristics.

Explanation:

• These characteristics can be functionally derived from the functional dependency using the rules of interference which are known as Armstrong's Rules.
• F is the symbol of functional dependency and the symbol of “{F}+” is the symbol of the closure of functional dependency  
• An example is a relation with R = (A, B, C, D)

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