Which of the following is NOT a property of a primary key?

Options

  • A. It uniquely identifies each record
  • B. It cannot contain NULL values
  • C. It can contain duplicate values
  • D. More than one of the above
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

C. It can contain duplicate values

Detailed Explanation

Explanation: A Primary Key must contain unique and non-NULL values. Duplicate values are not permitted in a primary key column.