php - 如何查询表并输出平均值、总和、位置、

Question

非常好，请提供任何帮助，我是 php 和 mysql 新手，我有一个表“学生”，其中包含以下字段和密码。

id idnumber | Math | English | Geography | Ict | Biology
1  va01       100    80        89          100   82
2  va02       90     79        70          30    76
3  va03       100    100       100         100   90

让我堆积的是如何通过php查询并从msql输出(Average,Total,Position,out of)，并且结果假设根据高passmark排列。 示例:第一个学生是 va03，第二个学生是 va01，第三个学生是 va02，假设是这样

1: va03  math English Geograph Ict Biology  Average Total  out of
         100  100     100      100 90       98      490    3

2: va01  Math English Geograph Ict Biology  Average Total  out of
         90   79      70       80  76       79      395    3

3: va02  Math English Geograph Ict Biology  Average Total  out of
         90   79      70       30  76       69        345  3

提前谢谢您。

Answer 1

我对 PHP 没有太多帮助，但 SQL 应该相当简单..

Select idnumber, math, english, geography, ict, biology,
Average(math + english + geography + ict + biology)/5  as `mAverage`, 
(Select count(*) from student) as `out of `,
math + english + geography + ict + biology as `Total`
From student
Group by idnumber, math, english, geography, ict, biology
order by Average desc;