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Discussion

The terms alternate key and candidate key mean the same thing.

  • A.True
  • B.False

Answer: A

Correct answer: True

A candidate key is any column or set of columns that could serve as the primary key, and once one has been chosen the remainder are the alternate keys. The terms are used interchangeably in this material, and the practical point is that each alternate key should be given a unique constraint so the DBMS enforces its uniqueness too.

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