w3resource
SQL exercises

SQL exercises on employee Database: List the no. of employees in each department where the no. is less than 4

SQL employee Database: Exercise-101 with Solution

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

101. Write a query in SQL to list the no. of employees in each department where the no. is less than 4.

Sample table: employees


Sample Solution:

SELECT dep_id,
       count(*)
FROM employees
GROUP BY dep_id
HAVING count(*)<4;

Sample Output:

 dep_id | count
--------+-------
   1001 |     3
(1 row)

Practice Online


Sample Database: employee

employee database structure

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

Previous: Write a query in SQL to display the department name, grade, no. of employees where at least two employees are working as a SALESMAN.
Next: Write a query in SQL to list the name of departments where atleast 2 employees are working in that department.

What is the difficulty level of this exercise?