Question

我用Google搜索，但没有发现任何符合我案例的内容。

declare @from_ datetime, @to_ datetime
SET @from_ = '2013-01-01' 
SET @to_ = '2013-10-01' 

DECLARE @query NVARCHAR(4000) 
SET @query = N'
DECLARE @from datetime, @to datetime
SET @from = CAST('''+@from_+''' AS datetime)
SET @to = CAST('''+@to_+''' AS datetime)
'

给出错误：

  Msg 241, Level 16, State 1, Line 34
Conversion failed when converting date and/or time from character string.

SET @query = N'是第34行

我还尝试使用CONVERT(datetime, '+@from_+', 102)和, 102)以及'''

只是

SET @from = CAST('+@from_+' AS datetime)

相同的结果

解决方案是PIVOT的一部分，所以我有声明，选择，转动和执行@query。其余的解决方案运行良好，直到我将日期时间付诸实践。

Answer 1

您的问题是您要使用varchar添加日期时间。试试这个：

declare @from_ char(8), @to_ char(8)
SET @from_ = '20130101' 
SET @to_ = '20131001' 

DECLARE @query NVARCHAR(4000) 
SET @query = N'
DECLARE @from datetime, @to datetime
SET @from = CAST('''+@from_+''' AS datetime)
SET @to = CAST('''+@to_+''' AS datetime)
'

Answer 2

我不确定，但我猜您已将附加撇号（'）附加到@from_和@to_

SET @from = CAST('''+@from_+''' AS datetime)
SET @to = CAST('''+@to_+''' AS datetime)

另外，为什么不直接设置像这样的值

SET @from = @from_
SET @to = @to_

Answer 3

尝试这样

declare @from_ NVARCHAR(50), @to_ NVARCHAR(50)
SET @from_ = '2013-01-01' 
SET @to_ = '2013-10-01' 

DECLARE @query NVARCHAR(4000) 
SET @query = N'
DECLARE @from datetime, @to datetime
SET @from = CAST('''+@from_+''' AS datetime)
SET @to = CAST('''+@to_+''' AS datetime)'
EXEC SP_EXECUTESQL @query

转换日期时转换失败

3 个答案: