Question

我正在尝试在表格中找到具有相同ID的每个数值的百分比值。例如，如果我的表包含以下内容：

id  answer          points
1   answer 1        3
1   answer 2        1
1   answer 3        10
1   answer 4        5
1   answer 5        6
1   answer 6        10
1   answer 7        10
1   answer 8        2

如果最大点数为80，如何以百分比形式显示数据库中的当前结果（点）？

Answer 1

求点（）并将它们除以80：

select id, sum(points), sum(points)/80 as percentage
from table
group by id

Answer 2

如果我理解正确：

select   100 * (points / 80) as Percentage
from     YourTable

您甚至可以考虑计算总分数：

select   100 * (points / (select sum(points) from YourTable)) as Percentage
from     YourTable

这样，您只需添加表格的答案，计算就会相应调整。

Answer 3

您可以将GROUP BY用于此目的，例如

select maxpoint * 0.1 as maxpoint_percent
from (
select id, sum(points) as maxpoint
from table1
group by id ) xx
where maxpoint >= 80;

如何从表列中查找百分比值

3 个答案: