Multiple choice technology databases

Features of Primary Key are:

  1. Unique

  2. Non Unique

  3. Null

  4. Not Null

  5. All of the above
Reveal answer Fill a bubble to check yourself
A,D Correct answer
Explanation

A Primary Key constraint enforces two database integrity rules: every value in the primary key column(s) must be unique, and no value in the primary key column(s) can be null.

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