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A beginner-friendly guide to SQL operators, including comparison, logical, pattern, range, list, and null-check operators with SQL Server-friendly examples.
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SQL operators are symbols or words used to compare, calculate, and filter data.
They help SQL decide which rows match your condition.
Operators build conditions. They make SQL queries more specific by telling the database how to compare and filter values.
AND, OR, and NOT to make logic more specific.LIKE helps find text that matches a pattern.WHERE salary > 40000
This condition returns only rows where salary is greater than 40000.
Different SQL operators are used for different types of conditions.
Operators are commonly used inside a WHERE condition.
SELECT
employee_name,
department,
salary
FROM Employees
WHERE salary > 40000;
> operator returns rows where salary is greater than 40000.You can combine conditions to filter data more precisely.
SELECT
employee_name,
department,
salary
FROM Employees
WHERE department = 'Sales'
AND salary > 40000;
This query returns employees who are in the Sales department and have a salary greater than 40000.
They are most commonly used inside WHERE conditions to return only the rows that match your logic.
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