在存儲過程中添加自定義消息

Question

我想根據if else條件在我的存儲過程中添加一些消息，我該怎麼做。問題是我有三個表隊，帳戶和用戶。如果沒有任何帳戶且用戶與該團隊有關，我只想在條件下刪除團隊表中的teamA。我有存儲過程工作正常，但我想檢查條件，並希望添加一些自定義消息使用if else。請在這裏幫助我的代碼。

Create PROCEDURE sp_DeleteTeam 

@pTeamId int 
AS 
BEGIN 

    SET NOCOUNT ON; 

    update t 
    set t.Deleted =1 
    from Team t 
    where t.TeamId = @pTeamId 
    And Not Exists (Select 1 from [User] where TeamId = @pTeamId) 

    And Not Exists (Select 1 from Account where TeamId = @pTeamId) 
END 

Answer 1

不要爲用戶存儲過程使用前綴sp_，因爲它是爲系統過程保留的。

下面是一個使用RAISERROR返回消息的示例。此示例中的嚴重度爲11或更高將在應用程序中引發異常。 10或更低的嚴重程度將生成一條信息性消息。

CREATE PROCEDURE usp_DeleteTeam @pTeamId int 
AS 
    BEGIN 

     SET NOCOUNT ON; 
     DECLARE @Message varchar(2047); 

     UPDATE t 
     SET  t.Deleted = 1 
     FROM Team t 
     WHERE t.TeamId = @pTeamId 
       AND NOT EXISTS (SELECT 1 
           FROM [User] 
           WHERE TeamId = @pTeamId) 
       AND NOT EXISTS (SELECT 1 
           FROM Account 
           WHERE TeamId = @pTeamId); 

     IF @@ROWCOUNT = 0 
      BEGIN 
       IF NOT EXISTS (SELECT * 
           FROM Team 
           WHERE TeamId = @pTeamId) 
        BEGIN 
         SET @Message = 'does not exist in Team table'; 
        END; 
       IF EXISTS (SELECT * 
          FROM [User] 
          WHERE TeamId = @pTeamId) 
        BEGIN 
         SET @Message = COALESCE(@Message + ', ', '') 
          + 'already exists in User table'; 
        END; 
       IF EXISTS (SELECT * 
          FROM Account 
          WHERE TeamId = @pTeamId) 
        BEGIN 
         SET @Message = COALESCE(@Message + ', ', '') 
          + 'already exists in Account table'; 
        END; 
       SET @Message = 'Team %d: ' + @Message 
       RAISERROR(@Message, 11, 0, @pTeamId); 
      END; 
    END; 

Answer 2

據我瞭解，你只是想看看它是否成功執行。如果存儲過程被稱爲在某些Applciation，最後，給出一個SELECT語句作爲

SELECT 'Your message' AS Message 

然後在應用程序中的結果存儲在數據集和檢索信息，

如果你不使用它在任何應用程序，然後只需使用

print 'your message' 

，或者可以嘗試更加具體和明確一點闡述您的問題。

Answer 3

使用下面的SP來使用打印或選擇消息。

Create PROCEDURE sp_DeleteTeam 

@pTeamId int 
AS 
BEGIN 
    SET NOCOUNT ON; 

    IF ((NOT EXISTS (SELECT TOP 1 FROM [User] WHERE TeamId = @pTeamId)) AND (Not EXISTS (SELECT TOP 1 FROM Account WHERE TeamId = @pTeamId))) 
    BEGIN 
    UPDATE T 
    SET T.Deleted = 1 
    FROM Team t 
    WHERE T.TeamId = @pTeamId 

    SELECT 'Not exist - Table updated' AS Message 
    --PRINT 'Not exist - Table updated' 
    END 
    ELSE 
    BEGIN 
    SELECT 'Already exist - Table not updated.' AS Message 
    --PRINT 'Already exist - Table not updated.' 
    END 
END