MySQL Subquery Exercises: Display the employee ID, first name, last name, and department name of all employees

MySQL Subquery: Exercise-13 with Solution

Write a query to display the employee ID, first name, last name, and department names of all employees.

Sample table: employees

Sample table : departments

Code:

SELECT employee_id, first_name, last_name, 
(SELECT department_name FROM departments d
 WHERE e.department_id = d.department_id) department 
 FROM employees e ORDER BY department;

Explanation:

MySQL Subquery Syntax:

- The subquery (inner query) executes once before the main query (outer query) executes.
- The main query (outer query) use the subquery result.

MySQL Code Editor:

Structure of 'hr' database:

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