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WAEC Data Processing 2016 Question 23

Question 23

Database Management

A data element that uniquely identifies one record from the other in a table is the

  1. A.attribute key.
  2. B.determinant.
  3. C.entity key.
  4. D.primary key.
Show the answer and explanation

Answer: D (primary key.)

Explanation

The primary key holds a unique value for each record, such as a matriculation number.