Logical operators allow you to test whether a condition is true or false. Therefore, the result returned by a logical operator is either true, false, or NULL (unknown). You can think of a NULL result ...

Learn about the three main logical operators in SQL: AND, OR, and NOT, and how to use them effectively in your queries. Get tips and best practices for filtering data in SQL.

Logical operators test for the truth of some condition. Logical operators, like comparison operators, return a **Boolean** data type with a value of TRUE, FALSE, or UNKNOWN.