Exam-style question
Try this first
Which statement correctly describes a composite primary key?.
- A.It is a primary key made from two or more attributes together
- B.It is a foreign key copied into every table
- C.It is an attribute that contains no values
- D.It is a primary key that can identify only one table in the database
Model answer
What a good answer should say
- It is a primary key made from two or more attributes together
Explanation
Why this works
A composite primary key combines multiple attributes so that their combined values uniquely identify a record.
Common mistake
No common mistake is linked to this question yet.