T-SQL：如何在动态SQL中使用参数？

我有以下动态查询,没有WHERE子句正在工作,这是期待着UNIQUEIDENTIFIER.

当我通过它,我没有得到结果.我尝试了CAST和CONVERT,但没有结果.我可能做错了,有人可以帮忙吗？

CREATE PROCEDURE [dbo].[sp_Test1] /* 'b0da56dc-fc73-4c0e-85f7-541e3e8f249d' */
(
@p_CreatedBy UNIQUEIDENTIFIER
)
AS
DECLARE @sql NVARCHAR(4000)
SET @sql ='

DECLARE @p_CreatedBY UNIQUEIDENTIFIER

SELECT 
  DateTime,Subject,CreatedBy
FROM
(
  SELECT 
    DateTime,CreatedBy,ROW_NUMBER() OVER(ORDER BY DateTime ) AS Indexing
  FROM
    ComposeMail
  WHERE 
    CreatedBy = @p_CreatedBy /* <--- the problem is in this condition */
) AS NewDataTable
'

EXEC sp_executesql @sql

解决方法

您必须将参数传递给sp_executesql. See MSDN for details.

...
 WHERE 
    CreatedBy = @p
...

EXECUTE sp_executesql @sql,N'@p UNIQUEIDENTIFIER',@p = @p_CreatedBY