SQL Exercise: Employees in department 2001 with the designation CLERK

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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

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