leetcodeDatabase4

一、Department Top Three Salaries

The Employee table holds all employees. Every employee has an Id, and there is also a column for the department Id.

&＃43;----&＃43;-------&＃43;--------&＃43;--------------&＃43;
| Id | Name | Salary | DepartmentId |
&＃43;----&＃43;-------&＃43;--------&＃43;--------------&＃43;
| 1 | Joe | 70000 | 1 |
| 2 | Henry | 80000 | 2 |
| 3 | Sam | 60000 | 2 |
| 4 | Max | 90000 | 1 |
| 5 | Janet | 69000 | 1 |
| 6 | Randy | 85000 | 1 |
&＃43;----&＃43;-------&＃43;--------&＃43;--------------&＃43;

The Department table holds all departments of the company.

&＃43;----&＃43;----------&＃43;
| Id | Name |
&＃43;----&＃43;----------&＃43;
| 1 | IT |
| 2 | Sales |
&＃43;----&＃43;----------&＃43;

Write a SQL query to find employees who earn the top three salaries in each of the department. For the above tables, your SQL query should return the following rows.

&＃43;------------&＃43;----------&＃43;--------&＃43;
| Department | Employee | Salary |
&＃43;------------&＃43;----------&＃43;--------&＃43;
| IT | Max | 90000 |
| IT | Randy | 85000 |
| IT | Joe | 70000 |
| Sales | Henry | 80000 |
| Sales | Sam | 60000 |
&＃43;------------&＃43;----------&＃43;--------&＃43;

分析&＃xff1a;