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WAEC Data Processing 2024 Question 22

Question 22

Database Management

The function of the foreign key in a database is to

  1. A.uniquely identify tuples in a table.
  2. B.provide a link between data in two tables.
  3. C.uniquely identify an entity occurrence.
  4. D.uniquely identify each record in a table.
Show the answer and explanation

Answer: B (provide a link between data in two tables.)

Explanation

A foreign key links a record to a related record in another table.