如何在蜂巢中找到薪水最高的每个部门的前 3 名员工？

Question

name, salary, department
joe, 95000, Manager
walter, 26500, HR
Adam, 36520,Developer
Sam, 38910, Developer
Romie, 68457,Manager
oliver, 69545, Developer
Mahesh, 89542, Developer
Ricky, 96845,HR
Sara, 84756,Manager
Anand, 36597, HR
Kevin, 98457, HR
Ram, 63547, Manager

输出应该是`

Developer, Mahesh, 89542
Developer, oliver, 69545
Developer, Sam, 38910
HR, Kevin, 98457
HR, Ricky, 96845
HR, Anand, 36597
Manager, joe, 95000
Manager, Sara, 84756
Manager, Romie, 68457

`

我希望所有记录都应该像给定的输出一样打印，这应该在 hive 中运行。

Answer 1

select dept, name, salary from (
    select name, salary, dept, row_number() over(partition by dept order by salary desc) as rn 
    from employee_sal
    ) emp 
where emp.rn<4;

结果将如下所示：

name salary dept Mahesh 89542 Developer oliver 69545 Developer Sam 38910 Developer Kevin 98457 HR Ricky 96845 HR Anand 36597 HR joe 95000 Manager Sara 84756 Manager Romie 68457 Manager