SQL Exercise: List the employees at a given place for over 10 years

Last update on December 20 2024 11:40:31 (UTC/GMT +8 hours)

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60. From the following table, write a SQL query to search for employees working in PERTH or MELBOURNE and month part of their achieved experience is more than 10. Return employee ID, employee name, department ID, salary, and department location.

Pictorial Presentation:

SQL exercises on employee Database: List the id, name, salary, and location of the employees working at PERTH, or MELBOURNE with an experience over 10 years

Sample table: employees

Sample table: department

Sample Solution:

SELECT e.emp_id,
       e.emp_name,
       e.dep_id,
       e.salary,
       d.dep_location
FROM employees e,
     department d
WHERE e.dep_id = d.dep_id
  AND d.dep_location IN ('PERTH',
                         'MELBOURNE')
  AND EXTRACT(MONTH
              FROM age(CURRENT_DATE, hire_date)) > 10;

Sample Output:

 emp_id | emp_name | dep_id | salary  | dep_location
--------+----------+--------+---------+--------------
  64989 | ADELYN   |   3001 | 1700.00 | PERTH
  65271 | WADE     |   3001 | 1350.00 | PERTH
(2 rows)

Explanation:

The given query in SQL that selects the employee ID, name, department ID, salary, and department location of employees who work in the departments located in either 'PERTH' or 'MELBOURNE' and whose hire date is more than 10 months ago from the current date.

The statement joins the 'employees' and 'department' tables based on the common column dep_id.

The "WHERE" clause restricts the results to employees whose department location is either 'PERTH' or 'MELBOURNE' using the "IN" operator, and it further filters the results to employees whose hire date is more than 10 months ago from the current date using the "age" and "EXTRACT" functions. The "age" function calculates the difference between the current date and the hire date, and the "EXTRACT" function extracts the month value from the result of the "age" function.

Practice Online

Sample Database: employee

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