# [Leetcode] Employees earning more Than their Managers employees earn more than managers

Source: Internet
Author: User

The `Employee` table holds all employees including their managers. Every employee has an ID, and there is also a column for the manager ID.

`+----+-------+--------+-----------+| Id | Name  | Salary | ManagerID |+----+-------+--------+-----------+| 1  | Joe   | 70000  | 3 |         | 2  | Henry | 80000  | 4         | | 3  | Sam   | 60000  | NULL      | | 4  | Max   | 90000  | NULL      |+----+-------+--------+-----------+`

Given `Employee` The table, write a SQL query that finds out employees who earn more than their managers. For the above table, Joe was the only employee of the WHO earns more than his manager.

`+----------+| Employee |+----------+| Joe      |+----------+`

This problem gives us an employee table, the employee's salary information and the manager's information, the manager also belongs to the staff, whose manager ID is empty, let us find the salary is higher than its manager's staff, then is a very simple comparison problem, We can generate two instance objects to cross through ManagerID and IDs, and then limit the condition to one salary greater than the other:

Solution One:

`SELECT  from Employee E1 JOIN  on = E2. IdWHERE> E2. Salary;`

We can also simply write the conditions in the where without a join:

Solution Two:

`SELECT  from Employee E1, employee E2 WHERE =  and > E2. Salary;`

Resources:

Https://leetcode.com/discuss/88189/two-straightforward-way-using-where-and-join

Leetcode all in one topic summary (continuous update ...)

[Leetcode] Employees earning more Than their Managers employees earn more than managers

Related Keywords:

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

## A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

• #### Sales Support

1 on 1 presale consultation

• #### After-Sales Support

24/7 Technical Support 6 Free Tickets per Quarter Faster Response

• Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.