Question

我无法使用CAST或CONVERT将varchar转换为小数。当我检查字符串是否为有效数字时，ISNUMERIC返回为有效数字。但是，当使用CAST或CONVERT时，会抛出“将数据类型varchar转换为数字时出错”。

尝试了不同的选择，但没有运气。如果我从字符串中删除“ e +”，它可以工作，但结果不正确。

我尝试使用REPLACE查看是否有任何东西。但是没用。

select isnumeric( '1.67022e+006') as c,
CAST('1.67022e+006') AS DECIMAL(24, 10)) AS ci,
CAST(replace('1.67022e+006','','') AS DECIMAL(24, 10)) AS cii,
CAST(replace('1.67022e+006','e+','') AS DECIMAL(24, 10)) AS civ,
CAST(1.67022e+006 AS DECIMAL(24, 10)) AS ciii;

CAST('1.67022e+006') AS DECIMAL(24, 10)) --> Error    
CAST(replace('1.67022e+006','','') AS DECIMAL(24, 10)) --> error    
CAST(replace('1.67022e+006','e+','') AS DECIMAL(24, 10)) --> 1.6702200600    
CAST(1.67022e+006 AS DECIMAL(24, 10)) --> 1670220.0000000000

Answer 1

我认为您不能直接将CAST的指数数字decimal

CAST()到FLOAT，然后到DECIMAL

select  CAST(CAST('1.67022e+006' AS FLOAT) AS DECIMAL(24, 10))

无法将有效的数字varchar转换为十进制

1 个答案: