Primary Keys
5 practice questionsDatabase SystemsStep-by-step solutions
Try a few
1
How many primary keys can a single table have?
A.Zero
B.One
C.Two
D.Unlimited
2
What is the defining property of a primary key in a relational table?
A.It uniquely identifies each row and cannot be null
B.It can contain duplicate values
C.It must reference another table
D.It is always a text field
3
A primary key composed of two or more columns is called a:
A.Foreign key
B.Composite key
C.Candidate key
D.Surrogate key
Master primary keys — not just preview it
All 5 questions with worked solutions, an AI tutor that explains every step, and games that make the drilling stick. Free to start.
Practice this topic freeNo card needed · 10 free AI questions daily