SQL SORTING and FILTERING on HR Database: Display the first and last name, and department number for all employees whose last name is "McEwen"

SQL SORTING and FILTERING on HR Database: Exercise-3 with Solution

3. From the following table, write a SQL query to find those employees whose last name is "McEwen". Return first name, last name and department ID.

Sample table: employees

Sample Solution:

SELECT first_name, last_name, department_id
 FROM employees
  WHERE last_name = 'McEwen';

Sample Output:

 first_name | last_name | department_id
------------+-----------+---------------
 Allan      | McEwen    |            80
(1 row)

Relational Algebra Expression:

Relational Algebra Tree:

Practice Online

Query Visualization:

Duration:

Rows:

Cost:

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Next: From the following table, write a SQL query to find those employees who have no department number. Return employee_id, first_name, last_name, email,phone_number,hire_date, job_id, salary,commission_pct,manager_id and department_id.