Question:
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 |+----------+
Analysis:
The Employee form contains all of the employees in the company, including their managers. Each employee has an employee ID and a manager ID.
Give the Employee form, write an SQL statement, and find the employee whose salary is higher than his manager. For example, in the example above, only Joe satisfies the situation.
Finally, what is followed by the Select, and if you encounter comparisons, you should choose to use two tables.
Answer:
Select from Employee E1, employee E2 where = and > E2. Salary
DataBase--Employees earning more Than their Managers My submissions Question