導致超時的SQL語句

Question

這是我真正需要修改的代碼。我做了一個簡單的方法，因爲我不是SQL中的專家。

SELECT Inv1.AutoIndex, Inv1.DocState, Inv1.OrderNum,  
Inv1.ExtOrderNum, dbo.Client.ubARSMS, dbo.Client.Fax1 
FROM  dbo.InvNum Inv1 INNER JOIN 
      dbo.Client ON Inv1.AccountID = dbo.Client.DCLink 
WHERE  (dbo.Client.ubARSMS = 1) 
    AND (Inv1.OrderDate >= dbo.Client.udARSMSACTDATE) 
    AND Inv1.OrderNum NOT IN (SELECT o.OrderNum 
          FROM dbo.net_OrderSMSLog o 
          WHERE (o.DocState = 4)) 
    AND Inv1.AutoIndex NOT IN(SELECT Inv2.OrigDocID 
          FROM dbo.InvNum Inv2 
          WHERE Inv2.OrderNum = Inv1.OrderNum) 
    AND 
     (
     DATEPART(YEAR, Inv1.InvDate) = DATEPART(YEAR, GETDATE()) 
     AND DATEPART(MONTH, Inv1.InvDate) = DATEPART(MONTH, GETDATE()) 
     AND DATEPART(DAY, Inv1.InvDate) = DATEPART(DAY, GETDATE()) 

    OR  
     DATEPART(YEAR, Inv1.InvDate) = DATEPART(YEAR,DATEADD(dd,-1,GETDATE())) 
     AND DATEPART(MONTH, Inv1.InvDate) = DATEPART(MONTH,DATEADD(dd,-1,GETDATE())) 
     AND DATEPART(DAY, Inv1.InvDate) = DATEPART(DAY,DATEADD(dd,-1,GETDATE())) 
    ) 

我需要這個工作儘可能快。

Answer 1

因爲我上面的查詢在服務器上的負載很小並且有較少的記錄需要執行時工作。

超時是我需要處理的唯一事情，無需在客戶端主數據庫上創建索引。

因此，我只是創建了第二個Windows服務，檢查第一個Windows服務是否因超時而崩潰/停止，然後重新啓動它。

解決了我的問題，超時崩潰我的服務。

Answer 2

這是您的查詢：

SELECT Inv1.AutoIndex, Inv1.DocState, Inv1.OrderNum,  
     Inv1.ExtOrderNum, c.ubARSMS, c.Fax1 
FROM dbo.InvNum Inv1 INNER JOIN 
    dbo.Client c 
    ON Inv1.AccountID = c.DCLink AND Inv1.OrderDate >= c.udARSMSACTDATE 
WHERE (c.ubARSMS = 1) AND 
     Inv1.OrderNum NOT IN (SELECT o.OrderNum 
          FROM dbo.net_OrderSMSLog o 
          WHERE (o.DocState = 4) 
          ) AND 
     Inv1.AutoIndex NOT IN (SELECT Inv2.OrigDocID 
          FROM dbo.InvNum Inv2 
          WHERE Inv2.OrderNum = Inv1.OrderNum 
          ) OR 
     (Inv1.InvDate >= CAST(DATEADD(day, -1 GETDATE()) as date) AND 
     Inv1.InvDate < CAST(GETDATE() as date) 
    ) 

這實際上是兩個查詢，您可以使用UNION ALL結合起來。第一個是：

SELECT Inv1.AutoIndex, Inv1.DocState, Inv1.OrderNum,  
     Inv1.ExtOrderNum, c.ubARSMS, c.Fax1 
FROM dbo.InvNum Inv1 INNER JOIN 
    dbo.Client c 
    ON Inv1.AccountID = c.DCLink AND Inv1.OrderDate >= c.udARSMSACTDATE 
WHERE (c.ubARSMS = 1) AND 
     Inv1.OrderNum NOT IN (SELECT o.OrderNum 
          FROM dbo.net_OrderSMSLog o 
          WHERE (o.DocState = 4) 
          ) AND 
     Inv1.AutoIndex NOT IN (SELECT Inv2.OrigDocID 
          FROM dbo.InvNum Inv2 
          WHERE Inv2.OrderNum = Inv1.OrderNum 
          ) 

對於這一點，我將在Client(ubARSMS, DCLink, udARSMACTDate)，InvNum(ClientId, OrderNum, AutoIndex)，InvNum(OrderNum, OrigDocId)，並net_OrderSMSLog(DocState, OrderNum)建議指標。

對於第二個查詢：

SELECT Inv1.AutoIndex, Inv1.DocState, Inv1.OrderNum,  
     Inv1.ExtOrderNum, c.ubARSMS, c.Fax1 
FROM dbo.InvNum Inv1 INNER JOIN 
    dbo.Client c 
    ON Inv1.AccountID = c.DCLink AND Inv1.OrderDate >= c.udARSMSACTDATE 
WHERE (Inv1.InvDate >= CAST(DATEADD(day, -1 GETDATE()) as date) AND 
     Inv1.InvDate < CAST(GETDATE() as date) 
    ) 

你想在InvNum(InvDate, AccountId, OrderDate)和Client(DCLink, udARSMACTDate)的索引。