Functional Dependencies, What exactly is the concept of Functional Dependencies? And how, Database Management System

Functional Dependencies, Database Management System

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What exactly is the concept of Functional Dependencies?
And how do we associate this concept with the logic of Super-keys, Candidate Keys, etc?

Given Relation R(A,B,C,D,E) with dependencies AB->C, CD->E, DE->B

Is AB a Candidate Key? OR is ABD a Candidate Key?

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Functional Dependencies, Database Management System

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