最近在刷leetcode題庫，剛好看到中文網站已經上線了，新增了ms sql直譯器。困難難度連結在這，就順便吐槽一下這個中文名字吧。 [ 力扣題庫 ]

185. 部門工資前三高的員工

Employee 表包含所有員工資訊，每個員工有其對應的 Id, salary 和 department Id 。

Department 表包含公司所有部門的資訊。

編寫一個 SQL 查詢，找出每個部門工資前三高的員工。例如，根據上述給定的表格，查詢結果應返回：

解法

select
 
 department ,employee ,salary 
from (
select b.name as department ,a.name as employee ,salary
,dense_rank() over(partition by departmentid order by salary desc) as rn 
from employee a 
left join department b
on a.departmentid=b.id where b.name is not null) a
where rn<=3 
order by department,salary desc
 

*如有問題，敬請留言。