我尝试在MySQL中转换为小数,如下所示:我尝试将表中的行数(乘以1.5)转换为点后两位数的浮点数。它会产生一个错误:corresponds to your MySQLserver version for the right syntax to use
near 'CAST((COUNT(*) * 1.5) AS <
我得到了非法的字符串偏移错误和未定义的变量,因此我将其转储到如下所示的数组中。{
$sql = "select cast(co as DECIMAL) as co, cast(sl as DECIMAL)as sl, cast(pr as character(10)) as pr, cast(qt as decimal) as qt FROM tailbone&qu
我在SP中有一个声明为nvarchar的变量,它的值是动态的,它可以是字符串或数字,它的值来自用户在全局搜索文本框中写入搜索表时的UI。只有当值是数字时,我才需要将其值从字符串转换为十进制,但是,在转换时会出现错误,因为cast()在转换像'abc'这样的字符串时会返回错误,但是如果值是'2000',则会很好。SELECT CAST('abc' AS DECIMAL(7,2) ) -- retruns error Error converting data typ
我正在尝试对csv文件中每一列的每一个值应用计算,并用这些新的计算值替换旧值。 #temp_list is a list of lists. Eg. [['1.3','2.2','1.6'],['1.2','4.5','2.3']] minimum = min(row) #find minimum value of values in column 2
y = every value in the 2nd column - minimum