mysql作业

employee.sql

+-- 部门工资最高的员工
+select d.`Name` as 'Department', e.`Name` as 'Employee',e.Salary
+from employee e LEFT JOIN department d on e.DepartmentId = d.Id
+where (e.Salary,e.DepartmentId) in (select max(Salary),DepartmentId from Employee group by DepartmentId);
+
+
+select d.Name as Department,e.Name as Employee,e.Salary
+from Department d,Employee e
+where e.DepartmentId=d.Id and e.Salary=(Select max(Salary) from Employee where DepartmentId=d.Id);
+
+
+
+
+--  部门工资前三高的员工
+select d.`Name` as 'Department', e.`Name` as 'Employee',e.Salary
+from employee e LEFT JOIN department d on e.DepartmentId = d.Id
+where 3>(SELECT count(*) from employee e2 where e2.Salary > e.Salary and e.DepartmentId = e2.DepartmentId)
+order by e.DepartmentId,e.Salary desc
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