﻿ SQL: List the employees who are senior to their own MANAGERS

# SQL Exercise: List the employees who are senior to their own MANAGERS

## SQL employee Database: Exercise-88 with Solution

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88. From the following table, write a SQL query to list the employees who are senior to their MANAGERS. Return complete information about the employees.

Sample table: employees

Sample Solution:

SELECT *
FROM employees w,
employees m
WHERE w.manager_id = m.emp_id
AND w.hire_date < m.hire_date;

OR

SELECT *
FROM employees w,
employees m
WHERE w.emp_id= m.manager_id
AND w.hire_date> m.hire_date;

Sample Output:

emp_id | emp_name | job_name | manager_id | hire_date  | salary  | commission | dep_id | emp_id | emp_name | job_name  | manager_id | hire_date  | salary  | commission| dep_id
--------+----------+----------+------------+------------+---------+------------+--------+--------+----------+-----------+------------+------------+---------+------------+--------
66928 | BLAZE    | MANAGER  |      68319 | 1991-05-01 | 2750.00 |            |   3001 |  68319 | KAYLING  | PRESIDENT |            | 1991-11-18 | 6000.00 |            |   1001
67832 | CLARE    | MANAGER  |      68319 | 1991-06-09 | 2550.00 |            |   1001 |  68319 | KAYLING  | PRESIDENT |            | 1991-11-18 | 6000.00 |            |   1001
65646 | JONAS    | MANAGER  |      68319 | 1991-04-02 | 2957.00 |            |   2001 |  68319 | KAYLING  | PRESIDENT |            | 1991-11-18 | 6000.00 |            |   1001
63679 | SANDRINE | CLERK    |      69062 | 1990-12-18 |  900.00 |            |   2001 |  69062 | FRANK    | ANALYST   |      65646 | 1991-12-03 | 3100.00 |            |   2001
64989 | ADELYN   | SALESMAN |      66928 | 1991-02-20 | 1700.00 |     400.00 |   3001 |  66928 | BLAZE    | MANAGER   |      68319 | 1991-05-01 | 2750.00 |            |   3001
65271 | WADE     | SALESMAN |      66928 | 1991-02-22 | 1350.00 |     600.00 |   3001 |  66928 | BLAZE    | MANAGER   |      68319 | 1991-05-01 | 2750.00 |            |   3001
(6 rows)

Explanation:

The said query in SQL retrieves a list of all employees who were hired before their managers, along with the data for both the employee and their manager.

The WHERE clause matches each employee with their respective manager based on the manager_id field and filters the result to include only employees who were hired before their respective managers.

## Practice Online

Sample Database: employee

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Previous SQL Exercise: List employees along with details of their departments.
Next SQL Exercise: Employees in ASC order of salary in department 1001.

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