Question

我想选择列的所有值，然后使用此列的最小值减去所有值。

MySQL语句如下：

for j = 1 to Ntime    
    for m = 1 to n_r
        'calculating the vector P(m)    
    next m

    'code below writes vector P(m) to new columns for every new time step
    'stating in column D    
    For m = 1 To n_r
        Cells(2 + m, 3 + j) = P(m)
    Next m
Next j

但是，MySQL会返回以下错误消息：

select `value`-min(`value`) from `table`

Answer 1

试试这个：

select   
   T.id,
   T.value - min_val 

from table T INNER JOIN ( select id , min(value) as min_val from table group by id) MT on  T.id = MT.id;

Answer 2

您可以使用子查询进行尝试：

select `value`- (select min(`value`) from `table`) 
from `table`

如何选择一列并用MySQL减去该列的最小数量

2 个答案: