如何修復此查詢以使其適用於ASP.NET應用程序？

Question

在我朋友的幫助下，我可以找到這個複雜的查詢。

DECLARE @LastSevenDays DATETIME, @Last30Days DATETIME 

SELECT @LastSevenDays = DATEADD(dd, -7, DATEADD(day, DATEDIFF(day, 0, GETDATE()), 0)), 
     @Last30Days = DATEADD(dd, -30, DATEADD(day, DATEDIFF(day, 0, GETDATE()), 0)) 

SELECT [D].DivisionName 
,  COUNT(DISTINCT CASE WHEN DateTimeComplete >= @LastSevenDays THEN UQ.Username ELSE NULL END) AS ParticipantsLast7Days 
,  COUNT(DISTINCT CASE WHEN DateTimeComplete >= @LastSevenDays THEN UQ.QuizID ELSE NULL END) AS QuizzesLast7Days 
,  COUNT(DISTINCT UQ.Username) AS ParticipantsLast30Days 
,  COUNT(DISTINCT UQ.QuizID) AS QuizzesLast30Days 
,  COUNT(DISTINCT EM.UserName) AS TotalParticipantsInDivisions 
,  COUNT(DISTINCT EM.UserName) - COUNT(DISTINCT UQ.Username) [ParticipantsInDivisionsWithoutQuiz] 
FROM employee EM 
     INNER JOIN Divisions D 
     ON D.SapCode = EM.DivisionCode 
     LEFT OUTER JOIN [UserQuiz] AS UQ 
     ON UQ.UserName = EM.UserName 
      AND DateTimeComplete >= @Last30Days 
GROUP BY [D].[DivisionName] 

這個查詢會告訴我下面的：在上週和上個月的測驗參與者

1. 總數
2. 測驗上週採取上個月
3. 總的總數每個部門的員工人數
4. 未接受任何測驗的每個部門的員工總數

該查詢工作正常，但現在在網站中放置一個表並嘗試使用包含此查詢的SqlDataSource配置它以從數據庫中檢索信息後，它要求我確定兩個變量的參數：@LastSevenDays和@ Last30Days，我不知道我應該怎麼做。請幫忙嗎？

我知道也許我的問題看起來很簡單，但我嘗試了很多，失敗了。請幫我

Answer 1

把它貼在存儲過程中，然後調用proc。

Answer 2

@LastSevenDays和@ Last30Days是您查詢使用的參數，因此SqlDataSource會請求它。

你可以做三件事情：

• 創建一個存儲過程和call it（見它調用存儲過程中的第二個例子）
• 取出參數並插入DATEADD功能無處不在，你通常引用的變量
• 在您的SqlDataSource中使用FilterParameter並將其初始化爲代碼。

Answer 3

您可以在線變量和有一個標準的select語句，像這樣：

SELECT [D].DivisionName 
,  COUNT(DISTINCT CASE WHEN DateTimeComplete >= DATEADD(dd, -7, DATEADD(day, DATEDIFF(day, 0, GETDATE()), 0)) THEN UQ.Username ELSE NULL END) AS ParticipantsLast7Days 
,  COUNT(DISTINCT CASE WHEN DateTimeComplete >= DATEADD(dd, -7, DATEADD(day, DATEDIFF(day, 0, GETDATE()), 0)) THEN UQ.QuizID ELSE NULL END) AS QuizzesLast7Days 
,  COUNT(DISTINCT UQ.Username) AS ParticipantsLast30Days 
,  COUNT(DISTINCT UQ.QuizID) AS QuizzesLast30Days 
,  COUNT(DISTINCT EM.UserName) AS TotalParticipantsInDivisions 
,  COUNT(DISTINCT EM.UserName) - COUNT(DISTINCT UQ.Username) [ParticipantsInDivisionsWithoutQuiz] 
FROM employee EM 
     INNER JOIN Divisions D 
     ON D.SapCode = EM.DivisionCode 
     LEFT OUTER JOIN [UserQuiz] AS UQ 
     ON UQ.UserName = EM.UserName 
      AND DateTimeComplete >= DATEADD(dd, -30, DATEADD(day, DATEDIFF(day, 0, GETDATE()), 0)) 
GROUP BY [D].[DivisionName] 

Answer 4

在.NET代碼，寫這樣的方法：

 private DataTable doQuery(DateTime last7Days, DateTime last30Days) 
     { 
      DataTable result = new DataTable(); 

      string connectionString = "";//TODO; 

      string query = @" 
SELECT [D].DivisionName 
,  COUNT(DISTINCT CASE WHEN DateTimeComplete >= @LastSevenDays THEN UQ.Username ELSE NULL END) AS ParticipantsLast7Days 
,  COUNT(DISTINCT CASE WHEN DateTimeComplete >= @LastSevenDays THEN UQ.QuizID ELSE NULL END) AS QuizzesLast7Days 
,  COUNT(DISTINCT UQ.Username) AS ParticipantsLast30Days 
,  COUNT(DISTINCT UQ.QuizID) AS QuizzesLast30Days 
,  COUNT(DISTINCT EM.UserName) AS TotalParticipantsInDivisions 
,  COUNT(DISTINCT EM.UserName) - COUNT(DISTINCT UQ.Username) [ParticipantsInDivisionsWithoutQuiz] 
FROM employee EM 
     INNER JOIN Divisions D 
     ON D.SapCode = EM.DivisionCode 
     LEFT OUTER JOIN [UserQuiz] AS UQ 
     ON UQ.UserName = EM.UserName 
      AND DateTimeComplete >= @Last30Days 
GROUP BY [D].[DivisionName] 
"; 

      using (SqlConnection conn = new SqlConnection(connectionString)) 
      { 
       using (SqlCommand cmd = new SqlCommand(query, conn)) 
       { 

        cmd.Parameters.Add(new SqlParameter("@LastSevenDays", last7Days)); 
        cmd.Parameters.Add(new SqlParameter("@Last30Days", last30Days)); 


        SqlDataAdapter sda = new SqlDataAdapter(cmd); 
        sda.Fill(result); 
       } 

      } 

      return result; 
     } 

，然後調用方法如下：

DataTable myData = doQuery(DateTime.Today.AddDays(-7.0), DateTime.Today.AddDays(-30));