MySQL Operators

Introduction to MySQL Operators

MySQL comes with special characters or words to perform certain operations. MySQL Operators are applied to the operands in order to carry out specific operations.

What are operators in MySQL?

Operators are used to specifying a condition in a statement in MySQL. Below are the different types of operators used in MySQL.

1. Arithmetic Operators

In MySQL, arithmetic operators are used to perform the arithmetic operations as described below.

The following are a few examples of operations, using Arithmetic Operators.

Let us assume certain values for the below variables as

a = 10 , b = 5

• a + b will give the result as 15.
• a – b will give the result as 5.
• a * b will give the result as 50.
• a / b will give the result as 2.
• a % b will give the result as 0.

2. Comparison Operators

The comparison operators in MySql are used to compare values between operands and return true or false according to the condition specified in the statement.

Let us take an example of EMPLOYEE table as shown below to understand how to use the comparison operators as stated above while performing MySQL queries.

Let us use the different comparison operators to query the EMPLOYEE table as shown below.

SELECT * FROM EMPLOYEE WHERE SALARY > 25000;

SELECT * FROM EMPLOYEE WHERE SALARY = 35000;

SELECT * FROM EMPLOYEE WHERE SALARY < 35000;

SELECT * FROM EMPLOYEE WHERE SALARY != 30000;

SELECT * FROM EMPLOYEE WHERE SALARY <> 35000;

3. Logical Operators

The logical operators used in MySQL are shown below.

Let us take the example of the same EMPLOYEE table as shown above earlier to understand the usage of logical operators as shown in the below queries.

SELECT * FROM EMPLOYEE WHERE AGE <= 25 AND SALARY >= 5000;

SELECT * FROM EMPLOYEE WHERE AGE >= 25 OR SALARY >= 25000;

SELECT * FROM EMPLOYEE WHERE AGE IS NOT NULL;

SELECT * FROM EMPLOYEE WHERE NAME LIKE 'Am%';

SELECT * FROM EMPLOYEE WHERE AGE BETWEEN 25 AND 30;

SELECT NAME FROM EMPLOYEE WHERE EXISTS (SELECT NAME FROM EMPLOYEE WHERE SALARY > 25000);

Recommended Articles

This has been a guide to MySQL Operators. Here we discuss different types of MySQL Operators like Arithmetic Operators, Comparison Operators, and Logical Operators with examples. You may also look at the following articles to learn more –

1. IS MySQL is an OpenSource?
2. How to use MySQL Commands
3. Top 25 MySQL Query Commands
4. Most Useful Cheat Sheet MySQL