クエリの最適化。重複したサブクエリ

Question

従来のシステムでは低速なクエリが見つかりました。私がクエリーで見るものは、重複フラグメントです。ここでは、完全なクエリがあります：ここでは

DECLARE @SellerId INT; 
DECLARE @DateFrom DATETIME; 
DECLARE @DateTo DATETIME; 

SET @SellerId = 5396884; 
SET @DateFrom = '2016-01-05'; 
SET @DateTo = '2016-10-08'; 

DECLARE @CurrentDate DATETIME; 
SET @CurrentDate = GETDATE(); 



CREATE TABLE #ReportDate (codes INT, dates DATETIME); 
DECLARE @dif as INT; 
DECLARE @cont as INT; 
DECLARE @currdate as DATETIME; 
SET @dif = DATEDIFF(day, @DateFrom, @DateTo); 
SET @cont = 1; 
SET @currdate = @DateFrom - 1; 
WHILE (@cont <= @dif + 1) 
BEGIN 
    SET @currdate = DATEADD(DAY, 1, @currdate); 
    INSERT INTO #ReportDate VALUES (@cont, @currdate); 
    SET @cont = @cont + 1; 
END 


/* HOW TO OPTIMIZE THIS ONE? */ 
SELECT 
     #ReportDate.dates as valid_date, 
     (
      SELECT 

      COUNT(DISTINCT(nonCancelledSales.num_remito)) as actives 

      FROM  
       (

        SELECT * 

        FROM salesView 

        WHERE 

         salesView.sell_id NOT IN 
          (
           SELECT sell_id 

           FROM salesStates 

           WHERE 
            salesStates.aborted = 1 
          ) 

       ) nonCancelledSales 

      WHERE 
       nonCancelledSales.seller_id = @SellerId AND 
       nonCancelledSales.cancelled = 0 AND 
       nonCancelledSales.void = 0 AND 
       nonCancelledSales.hasDiscount = 0 AND 
       nonCancelledSales.dateOfSale <= #ReportDate.dates AND 
       nonCancelledSales.currentState = (SELECT MAX(hveest.date) 

               FROM salesStates hveest 

               WHERE 
                hveest.sell_id = nonCancelledSales.sell_id AND 
                hveest.date <= #ReportDate.dates) AND 
       nonCancelledSales.lastProductDate = (SELECT  MAX(hvepro.date) 

               FROM productHistory hvepro 

               WHERE 
                hvepro.sell_id = nonCancelledSales.sell_id AND 
                hvepro.date <= #ReportDate.dates) 

     ) total_actives, 

     (
      SELECT 

      ISNULL(SUM(nonCancelledSales.paymentValue),0) as active 

      FROM  
       (

        SELECT * 

        FROM salesView 

        WHERE 

         salesView.sell_id NOT IN 
          (
           SELECT sell_id 

           FROM salesStates 

           WHERE 
            salesStates.aborted = 1 
          ) 

       ) nonCancelledSales 

      WHERE 
       nonCancelledSales.seller_id = @SellerId AND 
       nonCancelledSales.cancelled = 0 AND 
       nonCancelledSales.void = 0 AND 
       nonCancelledSales.hasDiscount = 0 AND 
       nonCancelledSales.dateOfSale <= #ReportDate.dates AND 
       nonCancelledSales.currentState = (SELECT MAX(hveest.date) 

               FROM salesStates hveest 

               WHERE 
                hveest.sell_id = nonCancelledSales.sell_id AND 
                hveest.date <= #ReportDate.dates) AND 
       nonCancelledSales.lastProductDate = (SELECT  MAX(hvepro.date) 

               FROM productHistory hvepro 

               WHERE 
                hvepro.sell_id = nonCancelledSales.sell_id AND 
                hvepro.date <= #ReportDate.dates)    
     ) active 
FROM 
     #ReportDate 
GROUP BY 
     #ReportDate.dates 



DROP TABLE #ReportDate 

は、私が見る2つの重複断片である：

(
      SELECT 

      COUNT(DISTINCT(nonCancelledSales.num_remito)) as actives 

      FROM  
       (

        SELECT * 

        FROM salesView 

        WHERE 

         salesView.sell_id NOT IN 
          (
           SELECT sell_id 

           FROM salesStates 

           WHERE 
            salesStates.aborted = 1 
          ) 

       ) nonCancelledSales 

      WHERE 
       nonCancelledSales.seller_id = @SellerId AND 
       nonCancelledSales.cancelled = 0 AND 
       nonCancelledSales.void = 0 AND 
       nonCancelledSales.hasDiscount = 0 AND 
       nonCancelledSales.dateOfSale <= #ReportDate.dates AND 
       nonCancelledSales.currentState = (SELECT MAX(hveest.date) 

               FROM salesStates hveest 

               WHERE 
                hveest.sell_id = nonCancelledSales.sell_id AND 
                hveest.date <= #ReportDate.dates) AND 
       nonCancelledSales.lastProductDate = (SELECT  MAX(hvepro.date) 

               FROM productHistory hvepro 

               WHERE 
                hvepro.sell_id = nonCancelledSales.sell_id AND 
                hvepro.date <= #ReportDate.dates) 

     ) total_actives, 

     (
      SELECT 

      ISNULL(SUM(nonCancelledSales.paymentValue),0) as active 

      FROM  
       (

        SELECT * 

        FROM salesView 

        WHERE 

         salesView.sell_id NOT IN 
          (
           SELECT sell_id 

           FROM salesStates 

           WHERE 
            salesStates.aborted = 1 
          ) 

       ) nonCancelledSales 

      WHERE 
       nonCancelledSales.seller_id = @SellerId AND 
       nonCancelledSales.cancelled = 0 AND 
       nonCancelledSales.void = 0 AND 
       nonCancelledSales.hasDiscount = 0 AND 
       nonCancelledSales.dateOfSale <= #ReportDate.dates AND 
       nonCancelledSales.currentState = (SELECT MAX(hveest.date) 

               FROM salesStates hveest 

               WHERE 
                hveest.sell_id = nonCancelledSales.sell_id AND 
                hveest.date <= #ReportDate.dates) AND 
       nonCancelledSales.lastProductDate = (SELECT  MAX(hvepro.date) 

               FROM productHistory hvepro 

               WHERE 
                hvepro.sell_id = nonCancelledSales.sell_id AND 
                hvepro.date <= #ReportDate.dates)    
     ) active 

は、クエリを複製することは十分に必要ですか？二つ目の

COUNT(DISTINCT(nonCancelledSales.num_remito)) as actives 

を：：彼はなってきた最初のものでは

ISNULL(SUM(nonCancelledSales.paymentValue),0) as active 

私は、クエリを書き換えるためにいくつかの方法があるように持っていると私はどのようにわかりません。

Answer 1

OUTER APPLYを使用する場合は、これらを組み合わせることができます。

考え方は次のとおりです。この場合、

SELECT . . ., x.actives, x.active 
FROM #ReportDate OUTER APPLY 
    (SELECT COUNT(DISTINCT(nonCancelledSales.num_remito)) as actives, 
      COALESCE(SUM(nonCancelledSales.paymentValue), 0) as active 
     . . . -- rest of query here 
    ) x; 

、OUTER APPLYが多く、複数の行を返すことができFROM句で相関サブクエリのようなものです。