Question

在SQL Server数据库中，我必须更新一些字段，查询是（，是小数点分隔符）：

UPDATE MyTbable 
SET 
Field1 =   CAST('111,11' AS DEC(18,4)),
Field2 =  CAST('222,22' AS DEC(18,4)),
Field3 =  CAST('333,33' AS DEC(18,4))
WHERE Id = '1'

我收到错误： 将数据类型varchar转换为数字时出错。我尝试使用强制转换，同样的问题

Field1，Field2和Field3是数字38,2

有什么想法吗？

谢谢，

Answer 1

取出逗号。

UPDATE MyTbable 
SET 
Field1 =  CAST(REPLACE('111,11',',','.') AS DEC(18,4)),
Field2 =  CAST(REPLACE('222,22',',','.') AS DEC(18,4)),
Field3 =  CAST(REPLACE('333,33',',','.') AS DEC(18,4))
WHERE Id = '1'

Answer 2

删除查询中的逗号，如：

UPDATE MyTbable 
SET 
Field1 =   CAST('11111' AS DEC(18,4)),
Field2 =  CAST('22222' AS DEC(18,4)),
Field3 =  CAST('33333' AS DEC(18,4))
WHERE Id = '1'

或者您可以使用替换删除逗号：

replace('111,11',',','.')

Answer 3

使用.代替,

UPDATE MyTbable 
SET 
  Field1 =  CAST('111.11' AS DEC(18,4)),
  Field2 =  CAST('222.22' AS DEC(18,4)),
  Field3 =  CAST('333.33' AS DEC(18,4))
WHERE Id = '1'

如果您想在之后以字符串和逗号选择这些值，请执行以下操作：

select replace(cast(Field1 as varchar(30)), '.',','),
       replace(cast(Field2 as varchar(30)), '.',','),
       replace(cast(Field2 as varchar(30)), '.',','),
where Id = '1'

SQL更新，字符串为数字

3 个答案: