五个最低值的总和

Question

如何在“点”列中找到最低五个点的总和 并按ID分组

Table

期望的结果应该是;

Results

不知道从哪里开始

由于

Answer 1

 select a.ID, SUM(a.points) from(select ID , points,row_number() over 
    (partition by ID order by POINTS) as rownum_returned from your_table) a where 
a.rownum_returned<6  group by a.ID;

Read about row_number() function here

Answer 2

如果我要这样做，我会用子查询解决它。 在SQL服务器中，我将执行检索5个较低点的子查询

Select Top 5 id, point from table
Order by point asc

注意：关键字TOP将结果限制为前5个 注2：逐点asc将命令结果置于最低值

之前

现在我使用查询作为子查询来完成活动

Select id, sum (point) from
(Select top 5 id,point from table order by point asc) group by id

这应该有效