SQL AND Tutorial

Example Table

We will use the following table named employees for our examples:


        CREATE TABLE employees (
            id INT PRIMARY KEY,
            first_name VARCHAR(50),
            last_name VARCHAR(50),
            department VARCHAR(50),
            salary DECIMAL(10, 2)
        );

        INSERT INTO employees (id, first_name, last_name, department, salary) VALUES
        (1, 'John', 'Doe', 'Engineering', 75000.00),
        (2, 'Jane', 'Smith', 'Marketing', 65000.00),
        (3, 'Sam', 'Brown', 'Engineering', 80000.00),
        (4, 'Sue', 'Johnson', 'HR', 60000.00),
        (5, 'Mike', 'Davis', 'Marketing', 70000.00);

id	first_name	last_name	department	salary
1	John	Doe	Engineering	75000.00
2	Jane	Smith	Marketing	65000.00
3	Sam	Brown	Engineering	80000.00
4	Sue	Johnson	HR	60000.00
5	Mike	Davis	Marketing	70000.00

Using SQL AND

The SQL AND operator is used to combine multiple conditions in a WHERE clause. All conditions must be true for the row to be included in the result set.

Example 1: Filtering by Department and Salary

SELECT first_name, last_name, department, salary FROM employees WHERE department = 'Engineering' AND salary > 75000;

Result:

first_name	Sam
last_name	Brown
department	Engineering
salary	80000.00

Example 2: Filtering by Department and Last Name

SELECT first_name, last_name, department, salary FROM employees WHERE department = 'Marketing' AND last_name = 'Davis';