Database-Management-System
August 29, 2024SQL
August 29, 2024Database-Management-System
| Question 486 |
A primary key for an entity is :
| a candidate key | |
| any attribute | |
| a unique attribute | |
| a superkey |
Question 486 Explanation:
A primary key for an entity is a unique attribute. No primary key should have NULL values.
Correct Answer: C
Question 486 Explanation:
A primary key for an entity is a unique attribute. No primary key should have NULL values.