MySQL OR Operator is one of the Logical Operator. Generally, we use this one in the WHERE Clause to apply multiple filters on the records returned by SELECT Statement. This MySQL OR operator returns the result as:
- 1, if all operands are not nulls, and any of the one operands is non zero.
- 0, if all the operands are not nulls, and all of them are zeros.
- NULL, If one of the operands is NULL, and remaining operands are zeros, otherwise 1.
Let us see how to use the MySQL Logical Operator OR in the WHERE clause to filter the data. To explain it, we are going to use the below shown data.
MySQL OR Operator Command prompt
In this OR example, we pass Ones, Zeros, and Null values with a different combination. This example helps you to understand the Truth table behind the MySQL OR Operator.
SELECT 0 OR 0; SELECT 1 OR 1; SELECT 1 OR 0; SELECT 1 OR NULL; SELECT 0 OR NULL; SELECT NULL OR NULL;
OR Operator Example
The OR test multiple conditions in the WHERE Clause. If either one of the conditions is TRUE, then it displays the records.
USE company; SELECT CustID, First_Name, Last_Name, Education, Profession, Yearly_Income, Sales FROM customers WHERE Education = 'High School' OR Profession = 'Developer';
You can also use MySQL OR operator between three or 4 conditions. Let us apply it in between three conditions
USE company; SELECT CustID, First_Name, Last_Name, Education, Profession, Yearly_Income, Sales FROM customers WHERE Education = 'High School' OR Profession = 'Developer' OR Yearly_Income > 90000;
The above statement retrieves Customers from Customers table whose Education is High School, or Profession as Developer, or Yearly Income is greater than 90000.