Please note, this is a STATIC archive of website www.w3resource.com from 19 Jul 2022, cach3.com does not collect or store any user information, there is no "phishing" involved.
w3resource

SQL subqueries on employee Database: List the name of the departments where more than average number of employees are working

SQL subqueries on employee Database: Exercise-44 with Solution

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

44. From the following table, write a SQL query to find those departments where more than average number of employees works. Return department name.

Sample table: employees


Sample table: department


Sample Solution:

SELECT d.dep_name
FROM department d,
     employees e
WHERE e.dep_id = d.dep_id
GROUP BY d.dep_name
HAVING count(*) >
  (SELECT AVG (mycount)
   FROM
     (SELECT COUNT(*) mycount
      FROM employees
      GROUP BY dep_id) a);

Sample Output:

 dep_name
-----------
 MARKETING
 AUDIT
(2 rows)

Practice Online


Structure of employee Database:

employee database structure

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

Previous: From the following table, write a SQL query to find those employees who joined in the company on the same date. Return complete information about the employees.
Next: From the following table, write a SQL query to find those managers who handle maximum number of employees. Return managers name, number of employees.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



SQL: Tips of the Day

SQL Server SELECT into existing table. 

INSERT INTO dbo.TABLETWO
SELECT col1, col2
  FROM dbo.TABLEONE
 WHERE col3 LIKE @search_key

This assumes there's only two columns in dbo.TABLETWO - you need to specify the columns otherwise:

INSERT INTO dbo.TABLETWO
  (col1, col2)
SELECT col1, col2
  FROM dbo.TABLEONE
 WHERE col3 LIKE @search_key

Database: SQL Server

Ref: https://bit.ly/3y6tpA3