在上面的图片中，我有4列，我试图通过对totalNumber进行除法来获得临界度和优先级的平均值。 。
我的SQL查询：
$command1 = "UPDATE rating SET criticality = criticality + '$c' / totalNumber , Priority = Priority + '$p' / totalNumber, totalNumber = totalNumber + '$counter' WHERE no = '$id'";
最佳答案
除法后，尝试将cast(round(criticality/totalNumber,1) as numeric(36,1))用于小数点后一位。
$command1 = "UPDATE rating SET criticality = cast(round(criticality/totalNumber,1) as numeric(36,1)) , Priority = cast(round(Priority /totalNumber,1) as numeric(36,1)) , totalNumber = totalNumber + '$counter' WHERE no = '$id'";
关于mysql - 如何在两列之间的SQL查询中进行除法，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/48759392/