SQL Exercises: Employees who work in the department Marketing

SQL SUBQUERY: Exercise-41 with Solution

From the following table, write a SQL query to find those employees who work in the department 'Marketing'. Return first name, last name and department ID.

Sample table: employees

Sample table: departments

Sample Solution:

SELECT first_name, last_name, department_id 
 FROM employees 
   WHERE department_id = 
       (SELECT department_id 
          FROM departments 
           WHERE department_name = 'Marketing');

Sample Output:

first_name	last_name	department_id
Michael		Hartstein	20
Pat		Fay		20

Code Explanation:

The said query in SQL that retrieves the first name, last name, and department id of all employees who belong to the department named "Marketing".
In this case, the WHERE clause is checks if the department_id of each employee matches the department_id of the department named "Marketing". The condition uses a subquery in the WHERE clause to retrieve the department_id of the "Marketing" department, and then compare it to the department_id of each employee.

Visual Presentation:

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Query Visualization:

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