DBMS Notes

Equivalence of Two Sets of FD’s

In DBMS, For equivalence of two sets of FD’s,

  • Two different sets of FD’s for a given table may or may not be equivalent.
  • If A and B are the two sets of FD’s, then the following cases are possible

Case 01: A covers B (A ⊇ B)

Case-02 : B covers A (B ⊇ A)

In Case 03: Both A and B cover each others (A = B)

Note: when Both A and B cover each other’s then it is known as A and B are equivalent otherwise both are not equivalent..

Notation

A  =  B

Explanation: 

Pending…….

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