Question

我需要将导入的VarChar转换为Text，并找到此代码

select * from [VWSA_Sewells].[dbo].[Sewells_1Mth_Composite] where ISNUMERIC(201307)=0
alter table [VWSA_Sewells].[dbo].[Sewells_1Mth_Composite] Add 201307_Temp decimal(17,4) 
GO

--Update temporary column with the values from 201307
update [VWSA_Sewells].[dbo].[Sewells_1Mth_Composite] set 201307_Temp = 201307
GO

--set 201307 to null
update [VWSA_Sewells].[dbo].[Sewells_1Mth_Composite] set 201307 = NULL
GO

--Change the datatype of 201307
alter table [VWSA_Sewells].[dbo].[Sewells_1Mth_Composite]  alter column 201307         decimal(17,4) 
GO

--Update the numeric values in 201307
--before doing this you have make sure select * from [VWSA_Sewells].[dbo].    [Sewells_1Mth_Composite] where ISNUMERIC(201307_Temp)=0 returns nothing.
update [VWSA_Sewells].[dbo].[Sewells_1Mth_Composite] set 201307 = Cast(201307_Temp as     decimal(17,4))
GO

我的表格在第1列包含Ratio_ID，例如VW1537_is02p，在第2列标题201307下包含实际Ratio。

201307栏仅包含数字数据，例如0.2242,5042050.40等。这些数字都不超过4位小数。

我在SQL Server 2008中的错误信息是

Msg 102，Level 15，State 1，Line 3
'201307'附近的语法不正确。

只要十进制提供最多10亿和4位的金额并允许查询（> 1等），我们就可以坚持使用十进制。

有什么想法吗？

Answer 1

这应该有效：

select * from [VWSA_Sewells].[dbo].[Sewells_1Mth_Composite] where ISNUMERIC([201307])=0
alter table [VWSA_Sewells].[dbo].[Sewells_1Mth_Composite] Add [201307_Temp] decimal(17,4) 
GO
--Update temporary column with the values from 201307
update [VWSA_Sewells].[dbo].[Sewells_1Mth_Composite] set [201307_Temp] = [201307]
GO
--set 201307 to null
update [VWSA_Sewells].[dbo].[Sewells_1Mth_Composite] set [201307] = NULL
GO
--Change the datatype of 201307
alter table [VWSA_Sewells].[dbo].[Sewells_1Mth_Composite]  alter column [201307] decimal(17,4) 
GO
--Update the numeric values in 201307
--before doing this you have make sure select * from [VWSA_Sewells].[dbo].    [Sewells_1Mth_Composite] where ISNUMERIC(201307_Temp)=0 returns nothing.
update [VWSA_Sewells].[dbo].[Sewells_1Mth_Composite] set [201307] = Cast([201307_Temp] as decimal(17,4))
GO

拉吉

将Varchar转换为数字

1 个答案: