文巾解题 185. 部门工资前三高的所有员工

Posted 2021-08-10 刘文巾

1 题目描述

 

 2 解题思路

1 先在employee表找到前三工资对应的员工

2 然后和department表联立，将部门的id转换成字符串

SELECT D.Name AS Department,
       MD.Employee,
       MD.Salary
FROM (SELECT E1.DepartmentId,
             E1.Name AS Employee,
             E1.Salary
      FROM Employee E1
      WHERE ((SELECT COUNT(DISTINCT E2.Salary)
              FROM Employee E2
              WHERE E2.Salary>E1.Salary
                    AND E2.DepartmentId=E1.DepartmentId)<3)) AS MD, 
      Department D
WHERE D.Id=MD.DepartmentId