SQL Exercise: Employees whose salary is in a range and location PERTH

Last update on December 20 2024 11:59:51 (UTC/GMT +8 hours)

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55. From the following table, write a SQL query to find those employees whose salary is between 2000 and 5000 (Begin and end values are included.) and location is PERTH. Return employee name, department ID, salary, and commission.

Sample table: employees

Sample table: department

Pictorial Presentation:

Sample Solution:

SELECT e.emp_name,
       e.dep_id,
       e.salary,
       e.commission
FROM employees e,
     department d
WHERE e.dep_id = d.dep_id
  AND d.dep_location = 'PERTH'
  AND e.salary BETWEEN 2000 AND 5000;

Sample Output:

 emp_name | dep_id | salary  | commission
----------+--------+---------+------------
 BLAZE    |   3001 | 2750.00 |
(1 row)

Explanation:

This is a SQL query that selects the employee name, department ID, salary, and commission for all employees from the employees and department tables.

The query is using an inner join in the WHERE clause to combine data from the employees and department tables based on their common column dep_id. It then includes the employees who work in the department located in Perth and whose salary is between 2000 and 5000.

Relational Algebra Expression:

Relational Algebra Tree:

Practice Online

Sample Database: employee

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