Question

What is functional dependency that is satisfied by all relations called?

Answer 1

When a column (entity) can be fully determined by another column, then it is functional dependent on that column.

Following are all functional dependencies which are possible from above relation.

A → B

A → C

B → A

B → C

C → A

C → B

Out of these functional dependencies, following are the functional dependencies satisfied by the relation.

B → A

B → C


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