SQL Server要求标量变量声明

Question

我的Management Studio中有以下SQL代码来创建存储过程。当试图执行查询，我得到一个错误信息：

必须声明标量变量“@Id”

可是我已经宣布@Id - 可能是什么问题呢？

我的代码：

CREATE PROCEDURE [dbo].[DecryptMyName] 
    (@Id Int, 
     @MyName varbinary(MAX)) 
AS 
GO 
OPEN SYMMETRIC KEY SymmetricKeyxx 
DECRYPTION BY CERTIFICATE Certificatexx; 
GO 
-- Now list the original ID, the encrypted ID 
SELECT CONVERT(nvarchar, DecryptByKey(MyName)) 
FROM dbo.MyTable WHERE Id=@Id ; 

-- Close the symmetric key 
CLOSE SYMMETRIC KEY SymmetricKeyxx; 
GO 

Answer 1

GO不是在存储过程中的身体不允许。我建议你总是将身体放在BEGIN/END以避免这个问题。

这是行不通的？

CREATE PROCEDURE [dbo].[DecryptMyName] (
    @Id Int , 
    @MyName varbinary(MAX) 
) AS 
BEGIN 
    OPEN SYMMETRIC KEY SymmetricKeyxx 
    DECRYPTION BY CERTIFICATE Certificatexx; 

    -- Now list the original ID, the encrypted ID 
    SELECT CONVERT(nvarchar, DecryptByKey(MyName)) 
    FROM dbo.MyTable WHERE Id=@Id ; 

    -- Close the symmetric key 
    CLOSE SYMMETRIC KEY SymmetricKeyxx; 

END; 

如果不是，则需要使用动态SQL。

Answer 2

在查询只是删除“开始”字，然后将工作

这样：

CREATE PROCEDURE [dbo].[DecryptMyName] 
     (@Id Int, 
      @MyName varbinary(MAX)) 
    AS 

    OPEN SYMMETRIC KEY SymmetricKeyxx 
    DECRYPTION BY CERTIFICATE Certificatexx; 

    -- Now list the original ID, the encrypted ID 
    SELECT CONVERT(nvarchar, DecryptByKey(MyName)) 
    FROM dbo.MyTable WHERE Id=@Id ; 

    -- Close the symmetric key 
    CLOSE SYMMETRIC KEY SymmetricKeyxx; 

最佳实践始终使用BEGIN和END语句用于存储过程 这样的：

CREATE PROCEDURE [dbo].[DecryptMyName] 
     (@Id Int, 
      @MyName varbinary(MAX)) 
    AS 
    BEGIN 
    OPEN SYMMETRIC KEY SymmetricKeyxx 
    DECRYPTION BY CERTIFICATE Certificatexx; 

    -- Now list the original ID, the encrypted ID 
    SELECT CONVERT(nvarchar, DecryptByKey(MyName)) 
    FROM dbo.MyTable WHERE Id=@Id ; 

    -- Close the symmetric key 
    CLOSE SYMMETRIC KEY SymmetricKeyxx; 
    END