執行函數多次或創建存儲過程

Question

假設我有這樣

SELECT 
    ROW_NUMBER() OVER (ORDER BY T1.FinalScore desc) as Position, 
    T1.Employee, T1.FinalScore 
FROM 
    (SELECT 
     Position, Employee, AVG(Score) as FinalScore 
    FROM 
     dbo.Answers 
    WHERE 
     DATEPART(year, EvaluationDate) = @Year 
    GROUP BY 
     Employee) as T1 

這是一個函數會返回一個表像這樣：

|--------|----------|-------| 
|Position| Employee | FScore| 
|========|==========|=======| 
| 1 | John | 5.6 | 
| 2 | Tom | 4.8 | 
| 3 | Paul | 3.6 | 
| 4 | Mark | 2.0 | 

現在我需要創建一個具有一個趨勢圖以前的表格，加上前幾年的信息。

我的問題是，什麼是最好的做法，我應該從我的asp.net頁面多次調用我的函數來檢索多個表格，並處理我的頁面上的信息。

或者我應該創建一個存儲過程多次執行此函數並將數據插入臨時表？就像這樣：

CREATE TABLE #TOP 
(
    Position int, 
    Employee nvarchar(60), 
    Score decimal(18,2) 
) 

DECLARE @Flag as int 

SET @Flag = @Year - 3 

WHILE (@Year > @Flag) 
BEGIN 
    INSERT INTO #TOP 
     SELECT * 
     FROM dbo.MyFunction(@Year) 

    SET @Year = @Year -1 
END 

SELECT * FROM #TOP 
DROP TABLE #TOP 

Answer 1

首先，可以簡化您的查詢：

SELECT row_number() over (order by avg(Score)) as position, 
      Employee, AVG(Score) as FinalScore 
    FROM dbo.Answers 
    WHERE DATEPART(year, EvaluationDate) = @Year 
    GROUP BY Employee; 

然後，如果你想這所有年份中，使用partition by：

SELECT row_number() over (partition by year(EvaluationDate) order by avg(Score)) as position, 
      Employee, AVG(Score) as FinalScore 
    FROM dbo.Answers 
    GROUP BY Employee, year(EvaluationDate);