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WAEC Data Processing 2021 Question 22

Question 22

Database Management

The field in a database which uniquely identifies each record is called a

  1. A.composite key.
  2. B.foreign key.
  3. C.local key.
  4. D.primary key.
Show the answer and explanation

Answer: D (primary key.)

Explanation

The primary key has a different value for every record.