SQL查找所有平均结果的最大值

Question

我有关系讲师（ID，姓名，dept_name，薪水）。

我如何找到平均工资最高的部门名称？

Answer 1

看起来像HAVING子句的作业

Answer 2

会这样做吗？

select top 1 id, name, avg (salary)
from instructor
group by id, name
order by avg (salary) desc

Answer 3

鉴于 homework 标签，我不会为您拼出，但您想查看AVG函数和GROUP BY子句。

Answer 4

select top 1 dept_name, avg(salary) as AvgSalary
from instructor
group by dept_name
order by AvgSalary desc

Answer 5

如果两个部门的平均工资相同，这将使你们两个，如果不需要，则使用rownum = 1.

with averages as (select dept_name,avg(salary) aver from instructor group by dept_name) select dept_name from averages where aver = (select max(aver) from averages)