數據透視表在存儲過程中使用視圖管理空值

Question

該存儲過程結果存儲在總共查詢的基礎上，如果總共沒有任何記錄 那麼結果就要0，如何管理空值。

CREATE PROCEDURE dbo.Procedure_Summary 
    @UserID INT , 
    @Year INT  
AS 
BEGIN 

/* Procedure body */ 

SELECT UserID, 
     UserName , 
     [Marks1] as 'English', 
     [Marks2] as 'Maths', 
     [Marks3] as 'Science' 
FROM 
    ( 
     SELECT l.UserID, 
       e.UserName , 
       s.SubjectName, 
       TotalMarks AS Total 
     FROM ViewLeave l 
      INNER JOIN SubjectType s ON s.SubjectID = l.SubjectID 
      INNER JOIN UserInfo e ON e.UserID = l.UserID 
     WHERE ((l.Result = 'Pass') 
       AND (e.UserID = @UserID) 
       AND l.[year]=@Year) 
     GROUP BY s.SubjectName,l.UserID, e.UserName ,TotalDays 
    )ps 
    pivot 
    (
     SUM(Total) 
     FOR SubjectName IN ([Marks1],[Marks2],[Marks3]) 
    ) AS pvt   

END 

當前結果和預期的結果是因爲 -

Accoding to current stored procedure result are as , 

UserID   UserName English  Maths  Science 
105     ABC  25  0  36 
106     XYZ  26  88  88 

But i want if all three subject marks are 0 means total are zero and then show 
as , also show non zero record 


UserID   UserName English  Maths  Science 
109     QWE   0  0  0 

Answer 1

 CREATE PROCEDURE dbo.Procedure_Summary @UserID INT , @Year INT AS BEGIN 

      /* Procedure body */ 
      SELECT UserID, UserName , [Marks1] as 'English', 
       [Marks2] as 'Maths', 
       [Marks3] as 'Science' FROM 
    (SELECT l.UserID, e.UserName , s.SubjectName, 
    case when l.Result = 'Pass' 
    then l.TotalMarks 
    else 0 end AS Total 
     from UserInfo e 
LEFT JOIN ViewLeave l ON e.UserID = l.UserID 
    LEFT JOIN SubjectType s ON s.SubjectID = l.SubjectID  

       Where e.UserID = @UserD AND 
       l.year=@Year 
       GROUP BY s.SubjectName,l.UserID, e.UserName ,TotalDays 
      )ps 
      pivot 
      (
       SUM(Total) 
       FOR SubjectName IN ([Marks1],[Marks2],[Marks3]) 
      ) AS pvt   

     END 

Answer 2

嘗試這一個 -

CREATE PROCEDURE dbo.Procedure_Summary 

    @UserID INT , 
    @Year INT  

AS BEGIN 

    SELECT 
      UserID 
     , UserName 
     , [English] = [Marks1] 
     , [Maths] = [Marks2] 
     , [Science] = [Marks3] 
    FROM 
    ( 
     SELECT 
       l.UserID 
      , e.UserName 
      , s.SubjectName 
      , Total = ISNULL(TotalMarks, 0) 
     FROM dbo.ViewLeave l 
     LEFT JOIN dbo.SubjectType s ON s.SubjectID = l.SubjectID 
     LEFT JOIN dbo.UserInfo e ON e.UserID = l.UserID 
     WHERE l.Result = 'Pass' 
      AND e.UserID = @UserID 
      AND l.[year] = @Year 
     GROUP BY 
       s.SubjectName 
      , l.UserID 
      , e.UserName 
      , TotalDays 
    ) ps 
    PIVOT 
    (
     SUM(Total) 
     FOR SubjectName In ([Marks1],[Marks2],[Marks3]) 
    ) pvt   

END 

Answer 3

這是很難完全回答這個問題，因爲表的細節並不是很好。

你可以嘗試運行與要傳遞給看看是否有任何數據被返回的用戶你的內部查詢：

SELECT l.UserID, 
    e.UserName , 
    s.SubjectName, 
    TotalMarks AS Total 
FROM ViewLeave l 
INNER JOIN SubjectType s ON s.SubjectID = l.SubjectID 
INNER JOIN UserInfo e ON e.UserID = l.UserID 
WHERE ((l.Result = 'Pass') 
    AND (e.UserID = @UserID) 
    AND l.[year]=@Year) 
GROUP BY s.SubjectName,l.UserID, e.UserName ,TotalDays -- I am not sure why you have this group by 

我猜測的問題的一部分是要加入的方式。您正在使用內部聯接，這將要求每個表中都存在行，但用戶正在被UserInfo表過濾。所以我會提出以下更改。

更改您的連接來LEFT JOIN的，使第一表連接是UserInfo表，這樣的代碼將是：

CREATE PROCEDURE dbo.Procedure_Summary 
    @UserID INT , 
    @Year INT  
AS 
BEGIN 

/* Procedure body */ 

SELECT UserID, 
     UserName , 
     [Marks1] as 'English', 
     [Marks2] as 'Maths', 
     [Marks3] as 'Science' 
FROM 
    ( 
     SELECT l.UserID, 
       e.UserName , 
       s.SubjectName, 
       TotalMarks AS Total 
     FROM UserInfo e 
     LEFT JOIN ViewLeave l 
      ON e.UserID = l.UserID 
      AND l.Result = 'Pass' 
      AND l.[year]=@Year 
     LEFT JOIN SubjectType s 
      ON s.SubjectID = l.SubjectID 
     WHERE e.UserID = @UserID 
    )ps 
    pivot 
    (
     SUM(Total) 
     FOR SubjectName IN ([Marks1],[Marks2],[Marks3]) 
    ) AS pvt   

END