In a relational database, what is a primary key?

Options

  • A. A key used to uniquely identify each record in a table
  • B. A key used to establish relationships between tables
  • C. A key used to sort records in a table
  • D. More than one of the above
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

A. A key used to uniquely identify each record in a table

Detailed Explanation

Explanation: A Primary Key uniquely identifies each record in a table. It must contain unique values and cannot contain NULL values.
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TRE 4.0 DBMS Quiz Practice Set 1

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