MYSQL从每个部门查找最大值

Question

我有一张这样的表

employeeid | departmentid | bossid | name | salary

我需要找到最高薪水，但是对于每个不同的离职人员。

Answer 1

将GROUP BY与汇总功能MAX()一起使用：

SELECT MAX(salary), departmentid FROM your_table GROUP BY departmentid;

Answer 2

您可以使用group by子句围绕departmentid构建一个组。对于该组，您可以使用聚合函数对每个组的数据运行操作，如max()

select departmentid,
       max(salary) as max_sal
from employees
group by departmentid

Answer 3

您需要使用MAX和Group By：

SELECT DepartmentId, MAX(SALARY) AS Salary
FROM EmployeesTable
GROUP BY DepartmentId

Answer 4

select departmentid,  max(salary) as salary
from yourtab
group by departmentid