1 題目描述

?

?2 解題思路

1 先在employee表找到前三工資對應的員工

2 然后和department表聯立，將部門的id轉換成字符串

SELECT D.Name AS Department,MD.Employee,MD.Salary FROM (SELECT E1.DepartmentId,E1.Name AS Employee,E1.SalaryFROM Employee E1WHERE ((SELECT COUNT(DISTINCT E2.Salary)FROM Employee E2WHERE E2.Salary>E1.SalaryAND E2.DepartmentId=E1.DepartmentId)<3)) AS MD, Department D WHERE D.Id=MD.DepartmentId

總結

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