mysql - MYSQL查找每个部门的最大值

Question

我有一张这样的桌子

employeeid | departmentid | bossid | name | salary

我需要找到最高工资，但对于每个不同的部门ID。

Answer 1

Answer 2

您可以使用该group by子句围绕departmentid. 对于该组，您可以使用聚合函数对每个组的数据运行操作，例如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