Relational Operators

In SQL (Structured Query Language), relational operators are used to perform comparisons between values in queries and conditions within SQL statements. These operators help filter and retrieve data based on specific criteria.

The common relational operators in SQL include:

Equal to (=): The equal to operator is used to check if two values are equal.

Example:

SELECT * FROM employees WHERE department = 'HR';

Not equal to (<>, !=): The not equal to operator checks if two values are not equal.

Example:

SELECT * FROM products WHERE price <> 100;

Greater than (>): The greater than operator checks if the left operand is greater than the right operand.

Example:

SELECT * FROM orders WHERE total_amount > 500;

Less than (<): The less than operator checks if the left operand is less than the right operand.

Example:

Greater than or equal to (>=): The greater than or equal to operator checks if the left operand is greater than or equal to the right operand.

Example:

Less than or equal to (<=): The less than or equal to operator checks if the left operand is less than or equal to the right operand.

Example:

These relational operators can be used in various SQL statements such as SELECT, WHERE clauses, JOIN conditions, and other situations where data comparison is required. They help to filter and retrieve specific data from the database based on the defined conditions.