SQL Exercise: Employees in department 2001 with the designation CLERK

Last update on December 20 2024 11:59:42 (UTC/GMT +8 hours)

[An editor is available at the bottom of the page to write and execute the scripts.]

38. From the following table, write a SQL query to find those employees whose designation is ‘CLERK’ and work in the department ID 2001. Return complete information about the employees.

Sample table: employees

Pictorial Presentation:

Sample Solution:

SELECT *
FROM employees
WHERE job_name ='CLERK'
  AND dep_id = 2001;

Sample Output:

 emp_id | emp_name | job_name | manager_id | hire_date  | salary  | commission | dep_id
--------+----------+----------+------------+------------+---------+------------+--------
  63679 | SANDRINE | CLERK    |      69062 | 1990-12-18 |  900.00 |            |   2001
  68736 | ADNRES   | CLERK    |      67858 | 1997-05-23 | 1200.00 |            |   2001
(2 rows)

Explanation:

The given query in SQL that selects all the columns from the table 'employees' and returns a subset where the job_name is 'CLERK' and the dep_id is 2001.

The WHERE clause filters the subset that 'job_name' column must have a value of 'CLERK', and the 'dep_id' column must have a value of 2001.

Relational Algebra Expression:

Relational Algebra Tree:

Practice Online

Sample Database: employee

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous SQL Exercise: List the Employees who work for department 1001 or 2001.
Next SQL Exercise: List ID, name, salary, and job_name of the employees.