Multiple choice

The purpose of the primary key in a database is to

  1. unlock the database

  2. provide a map of the data

  3. uniquely identify a record

  4. establish constraints on database operations.

  5. None of these

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A primary key in a relational database uniquely identifies every record in a table, ensuring data integrity and preventing duplicate rows. This is a duplicate of question 321164 and shares the same correct answer.