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 is a specific field or combination of fields that uniquely identifies each record in a table. It ensures that no duplicate rows can exist for that identifier. The other options describe unrelated database functions.

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