Question

我正在尝试获得每个部门的最高3个最高薪水，但是在我的代码q.salary的末尾我收到以下错误：ORA-00904：“Q”。“SALARY”：无效的标识符

这是我的代码

with query as (
   select max(salary), department_id 
   from employees 
   group by department_id
)
SELECT ROWNUM as RANK, 
       e.last_name, 
       e.salary
FROM (
   select department_id, salary
   from employees e, 
        query q 
   where e.salary = q.salary
)
where rownums <=3

提前谢谢

Answer 1

您需要为列表达式max（salary）...

添加别名

select max(salary) max_salary ...

...然后随后将其称为max_salary。

“rownums”也应该是“rownum”。

Answer 2

您需要为聚合命名：

select max(salary) as salary, 
       department_id 
from employees group by department_id

oracle rownum无效标识符

2 个答案: