Question

我需要在Oracle 11g中创建一个可以使用这些表的视图：

员工

 FirstName | LastName | EmployeeID
-----------------------------------
    joe    |   shmo   |     1
    bob    |   moll   |     2

SALESDATA

 Employee ID | commission on sale
----------------------------------
     1       |   $20
     1       |   $30
     2       |   $50
     2       |   $60

然后总结每位员工赚取的佣金总额，并返还获得最多佣金的员工。

因此，使用示例数据时，视图将包含employee id :: 2或bob moll。

Answer 1

这可以满足您的需求

将someviewname创建为视图

Select EmployeeID, sum (commision) 
from employees
left outer join salesData on salesData.EmployeeID = employees.EmployeeID
Group by EmployeeID, commision
order by commission desc

Answer 2

SELECT employeeID
FROM
  (SELECT employeeID,
    SUM(commission)
  FROM sales
  GROUP BY employeeID
  ORDER BY SUM(commission)
  )
WHERE rownum = 1

不确定为什么要对此进行查看，但希望您能解决这个问题。

Answer 3

在Oracle 12g +中，您可以使用fetch：

select employeeid
from sales
group by employeeid
order by sum(commission) desc
fetch first 1 row only;

在早期版本中，一种方法是使用rownum：

select s.*
from (select employeeid
      from sales
      group by employeeid
      order by sum(commission) desc
     ) s
where rownum = 1;

如何根据另一个值的值创建列值之和的最大总和的oracle视图

3 个答案: