PostgreSQL Subquery: Find all the information of the employees whose salary greater than the average salary for all departments
10. Write a SQL subquery to find all the information of the employees whose salary greater than the average salary of all departments.
Sample Solution:
Code:
SELECT *
FROM employees
WHERE salary >
ALL(SELECT avg(salary)
FROM employees
GROUP BY department_id);
Sample table: employees
Output:
pg_exercises=# SELECT * pg_exercises-# FROM employees pg_exercises-# WHERE salary > pg_exercises-# ALL(SELECT avg(salary) pg_exercises(# FROM employees pg_exercises(# GROUP BY department_id); employee_id | first_name | last_name | email | phone_number | hire_date | job_id | salary | commission_pct | manager_id | department_id -------------+------------+-----------+---------------+--------------+------------+---------+----------+----------------+------------+--------------- 100 | Steven | King | not available | 515.123.4567 | 1987-06-17 | AD_PRES | 24000.00 | 0.00 | 0 | 90 (1 row)
Practice Online
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Previous: Write a SQL subquery to find all the information of the employees who draws the same salary as the minimum salary for all departments.
Next: Write a subquery to find the first_name, last_name, job_id and salary of the employees who draws a salary that is higher than the salary of all the Shipping Clerk (JOB_ID = 'SH_CLERK'). Sort the results on salary from the lowest to highest.
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