SQL Exercise: List all the employees who report to Blaze

SQL subqueries on employee Database: Exercise-48 with Solution

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

48. From the following table, write a SQL query to find those employees who work as managers. Return complete information about the employees. Use co-related subquery.

Sample table: employees

Sample Solution:

SELECT *
FROM employees
WHERE emp_id IN
    (SELECT manager_id
     FROM employees);

Sample Output:

 emp_id | emp_name | job_name  | manager_id | hire_date  | salary  | commission | dep_id
--------+----------+-----------+------------+------------+---------+------------+--------
  68319 | KAYLING  | PRESIDENT |            | 1991-11-18 | 6000.00 |            |   1001
  66928 | BLAZE    | MANAGER   |      68319 | 1991-05-01 | 2750.00 |            |   3001
  67832 | CLARE    | MANAGER   |      68319 | 1991-06-09 | 2550.00 |            |   1001
  65646 | JONAS    | MANAGER   |      68319 | 1991-04-02 | 2957.00 |            |   2001
  67858 | SCARLET  | ANALYST   |      65646 | 1997-04-19 | 3100.00 |            |   2001
  69062 | FRANK    | ANALYST   |      65646 | 1991-12-03 | 3100.00 |            |   2001
(6 rows)

Explanation:

The said query in SQL that retrieves all the employees from the 'employees' table who are listed as a manager in the manager_id column.

The subquery retrieves all the employees table where the emp_id column matches any of the manager_id values.

Practice Online

Structure of employee Database:

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

Previous SQL Exercise: List all employees who are subordinates to Blaze.
Next SQL Exercise: Names of the employees and the manager of JONAS.