我在MySQL中具有以下结构的查询结果
class | eng | math | sci | ss | kisw
-------+------------+-------------------
4N | 80.2 | 41.2 |96.3 |52.0 | 41.5
4S | 52.3 | 45.2 |98.5 |65.2 | 85.3
5N | 74.3 | 87.0 |69.9 |74.2 | 84.5
5S | 87.5 | 45.6 |72.3 |25.6 | 10.3
上面的查询给出了每个班级的学科分数。我想执行一个查询，该查询将为我提供每个学科最好的课程。最终结果应该是这样的：
subject | class | score
--------+-------+-------
eng | 5S | 87.5
math | 5N | 87.0
sci | 4S | 98.5
ss | 5N | 74.2
kisw | 4S | 85.3
我尝试着看这些问题，但没有一个答案解决了为许多具有相应列值的列选择最大值的问题
Select MAX value from column and corresponding value from another
最佳答案
您可以尝试使用全部工会
select 'eng' as subject,class,eng from tablename
where eng =(select max(eng) from tablename)
union all
select 'math',class,math from tablename
where math=(select max(math) from tablename)
union all
select 'sci',class,sci from tablename
where sci=(select max(sci) from tablename)
union all
select 'ss',class,ss from tablename
where ss=(select max(ss) from tablename)
union all
select 'kisw', class,kisw from tablename
where kisw=(select max(kisw) from tablename)
关于mysql - 从具有相应列值的多列mysql中选择最大值，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/58911927/