Question

根据以下员工数据表：

Employee_id Employee_department Salary
100         ACCOUNTING          50000
200         SALES               75000
300         SALES               100000
400         ACCOUNTING          60000

请帮助查询输出下面的列表，在每个部门中按降序排序工资，其中最高工资分配顺序＃1：

Employee_id Employee_department Salary Sequence
400         ACCOUNTING          60000  1
100         ACCOUNTING          50000  2
300         SALES               100000 1
200         SALES               75000  2

谢谢！

Answer 1

您可以使用分析函数，特别是RANK()函数：

SELECT
  Employee_id,
  Employee_department,
  Salary,
  RANK() OVER (PARTITION BY Employee_department ORDER BY Salary DESC) AS Sequence
FROM myTable

PARTITION按部门执行排名;删除它，你将获得所有部门的排名。

RANK将包括关系，所以如果有两个人在部门中分享最高薪水，他们都会排名第一，而次高薪将排在第3位。如果您希望下一个最高薪水排名＃2而不是＃3，请使用DENSE_RANK。

Answer 2

SELECT Employee_id, Employee_department, Salary,
RANK() WITHIN GROUP
   (ORDER BY Employee_department ASC, Salary DESC) "Sequence" 
FROM t

糟糕，WITHIN GROUP不能用作分析，这里是另类

SELECT Employee_id, Employee_department, Salary,
(SELECT COUNT(*)
          FROM t x 
         WHERE x.salary >= t.salary AND x.Employee_department =t.Employee_department ) AS  "Sequence"
FROM t
ORDER BY Employee_department ASC, Salary DESC

如何在GROUP BY中的行中添加具有数字排名的列？

2 个答案: