mysql - SQL查询中如何在两列之间进行除法

Question

在上图中，我有 4 列，我试图通过将其除以总数量来获得关键性和优先级的平均值。但由于某种原因，我的查询不起作用，并且我还尝试在除法后仅获取一位小数。

我的sql查询:

$command1 = "UPDATE rating SET criticality = criticality + '$c' / totalNumber , Priority = Priority + '$p' / totalNumber, totalNumber = totalNumber + '$counter' WHERE no = '$id'";

Answer 1

尝试使用 cast(round(riticity/totalNumber,1) as numeric(36,1)) 除法后保留一位小数。

$command1 = "UPDATE rating SET criticality = cast(round(criticality/totalNumber,1) as numeric(36,1)) , Priority = cast(round(Priority /totalNumber,1) as numeric(36,1)) , totalNumber = totalNumber + '$counter' WHERE no = '$id'";