[Check Point 12.1] Simple Queries in SQL – Chapter 12 Sumita Arora
Table of Contents
5. What is a null value in MySQL database? Can you use nulls in arithmetic expressions?
Solution:
- Null value represents the absence of a value or an unknown value in a database column.
- Yes, you can use nulls in arithmetic expressions. However, any arithmetic operation involving a null value returns a null result.