SQL Server需要標量變量聲明

Question

我在Management Studio中使用以下SQL代碼創建存儲過程。 嘗試執行查詢時，出現錯誤消息：

必須聲明標量變量“ @Id”

但是我已經聲明了@Id可能是什么問題？

我的代碼：

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

存儲過程正文中不允許使用GO 。 我建議您始終將主體括在BEGIN / END以避免出現此問題。

這樣行嗎？

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;

如果沒有，您將需要使用動態SQL。

Answer 2

只需在查詢中刪除“開始”字樣即可

這條路：

    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;

對於最佳實踐，請始終對存儲過程使用BEGIN和END語句，如下所示：

    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