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Functional Dependency

  • It represents the relationship that exists between two attributes.

  • Notation: X → Y where, X = Determinant, Y = Dependent

Types of Functional Dependency

1. Trival Functinonal Dependency

  • A → B has trival functional dependency if B is a subset of A.

2. Non-trival Functional Dependency

  • A → B has non-trival functional dependency if B is not a subset of A.