Question

我正在研究SQL Server中的现有视图。我的用户现在报告性能太慢了。有人可以让我知道如何提高查询/视图的性能

查询：

Select FH.ForecastID  
,FH.FiscalYear  
,FH.FiscalMonth  
,FH.ForecastStatusCode  
,FH.ForecastStatusDescription  
,WF.SubTypeID  
,WF.CustomerCode  
,WF.ProductID  
,WF.EndCustomerName  
,CU.RELShortName [Master Customer 1]  
,CASE WHEN (WF.EndCustomerName <> '' ) THEN CASE WHEN (CST.[Shortname] IS NULL ) THEN          CU.ShortName ELSE CST.[Shortname] END ELSE CU.ShortName END AS CustomerShortName
 ,CASE WHEN (WF.EndCustomerName <> '' ) THEN CASE WHEN (CST.[Shortname] IS NULL ) THEN CASE WHEN    (CU.[CUSTOMER_CATEGORY] = 'ASU') THEN 'AU' ELSE 'GP' END ELSE CASE WHEN (CST.[CUSTOMER_CATEGORY] =   'ASU') THEN 'AU' ELSE 'GP' END END ELSE CASE WHEN (CU.[CUSTOMER_CATEGORY] = 'ASU') THEN 'AU' ELSE   'GP' END END AS CustomerCategory
  , '' as  CustomerShortName    
,WF.EndCustomerName as [Disti End Customer]  
,CU.CustomerName [Sold To Customer Name]  
,WF.CustomerCode [Customer Sold To Number]  
,CU.CustomerClass  
,CASE WHEN (CU.CustomerClass <> 'Distributor' ) THEN CU.TerritoryCode ELSE WF.[Sales Office] END   AS [Sales Office]
,FH.REA_Onshore [Off Shore On Shore]  
,PR.ProductFamilyName [OSC Product Family(1)]  
,PR.ProductClassName [OSC Product Family(2)]  
,PR.ProductPartNumber  
,FH.ForecastTypeID  
,FH.ForecastTypeCode  
,FH.ForecastTypeDescription as ForecastTypeDescription 
,WF.SubType  
, ISNULL(WF.CreatedDate , '')  CreatedDate  
, ISNULL(WF.ModifiedDate, '')  ModifiedDate  
,WF.ModifiedBy  
,IsNull([MON-3], '0') [MON-3]  
,IsNull([MON-2], '0') [MON-2]  
,IsNull([MON-1], '0') [MON-1]  
,IsNull([MON00], '0') [MON00]  
,IsNull([MON01], '0') [MON01]  
,IsNull([MON02], '0') [MON02]  
,IsNull([MON03], '0') [MON03]  
,IsNull([MON04], '0') [MON04]  
,IsNull([MON05], '0') [MON05]  
,IsNull([MON06], '0') [MON06]  
,IsNull([MON07], '0') [MON07]  
,IsNull([MON08], '0') [MON08]  
,IsNull([MON09], '0') [MON09]  
,IsNull([MON10], '0') [MON10]  
,IsNull([MON11], '0') [MON11]  
,IsNull([MON12], '0') [MON12]  
,IsNull([MON13], '0') [MON13]  
,IsNull([MON14], '0') [MON14]  
 from TRX_ForecastDetailFlattened WF 
 left Join (
 SELECT ForecastID, FiscalYear, FiscalMonth, ForecastStatusCode, ForecastStatusDescription,   FH.ForecastStatusID, REA_Onshore, FH.ForecastTypeID, FT.ForecastTypeCode, FT.ForecastTypeDescription 
 FROM PRF_ForecastHeader FH 
 inner Join LKP_ForecastStatus FS with (nolock) on FS.ForecastStatusID = FH.ForecastStatusID  
 inner Join LKP_ForecastType FT with (nolock) on FT.ForecastTypeID = FH.ForecastTypeID  ) FH
 on WF.ForecastID = FH.ForecastID 

 left Join (
 select RELShortName, [ACTUAL_END_CUSTOMER_NAME],CustomerName, CustomerClass,   TerritoryCode,CU.CustomerCode, ShortName ,[CUSTOMER_CATEGORY]
 FROM LKP_Customer CU 
 left join (SELECT distinct [ACTUAL_END_CUSTOMER_NAME],[Shortname], [CUSTOMER_CATEGORY] FROM    [REA_DS].[dbo].[LCUS_CUSTOMER_SHORTNAME] ) CSTM on CSTM.[ACTUAL_END_CUSTOMER_NAME] COLLATE    Latin1_General_CI_AI  = CU.[RELShortName] COLLATE Latin1_General_CI_AI 
 left Join PRF_Territory TE with (nolock) on TE.TerritoryID = CU.TerritoryID  
 left Join LKP_TerritoryGroup TG with (nolock) on TG.TerritoryGroupID = TE.TerritoryGroupID and TG.TerritoryGroupName = 'SALES REP COMPANY') CU
 on CU.CustomerCode = WF.CustomerCode  

 left Join (
 select ProductID, ProductPartNumber, ProductFamilyName, ProductClassName 
 FROM LKP_Product PR with (nolock) 
 left Join LKP_ProductClass PC with (nolock) on PR.ProductClassID = PC.ProductClassID  
 left Join LKP_ProductFamily  PF with (nolock) on PF.ProductFamilyID = PR.ProductFamilyID  ) PR
  on PR.ProductID = WF.ProductID  

 left join (SELECT distinct [ACTUAL_END_CUSTOMER_NAME],[Shortname],[CUSTOMER_CATEGORY] FROM    [REA_DS].[dbo].[LCUS_CUSTOMER_SHORTNAME] ) CST 
    on  WF.EndCustomerName COLLATE Latin1_General_CI_AI  = CST.[ACTUAL_END_CUSTOMER_NAME]   COLLATE Latin1_General_CI_AI 

 Where   CU.RELShortName <> '' and wf.CustomerCode <> '100000'
 group by  FH.ForecastID ,FH.FiscalYear ,FH.FiscalMonth ,FH.ForecastStatusCode    ,FH.ForecastStatusDescription ,WF.SubTypeID ,WF.CustomerCode ,WF.ProductID  
,WF.EndCustomerName ,CU.RELShortName ,WF.EndCustomerName ,CU.CustomerName ,WF.CustomerCode  ,CU.CustomerClass ,FH.REA_Onshore ,PR.ProductFamilyName  
,PR.ProductClassName ,PR.ProductPartNumber ,FH.ForecastTypeID ,FH.ForecastTypeCode   ,FH.ForecastTypeDescription ,WF.SubType ,WF.ModifiedBy  
,CST.[Shortname] ,CU.ShortName ,CST.[CUSTOMER_CATEGORY] ,CU.[CUSTOMER_CATEGORY] ,CU.TerritoryCode ,WF.[Sales Office] ,WF.CreatedDate ,WF.ModifiedDate
 , [MON-3], [MON-2], [MON-1], [MON00], [MON01], [MON02], [MON03], [MON04],[MON05], [MON06],  [MON07], [MON08], [MON09], [MON10], [MON11], [MON12], [MON13], [MON14]

截图： enter image description here

Answer 1

--one of the way to increase performance is the usage of the  temp tables instead subqueries
-------------------------------------------------------------------------------------
IF OBJECT_ID('Tempdb..#FH') IS NOT NULL 
    DROP TABLE #FH
SELECT  ForecastID ,
        FiscalYear ,
        FiscalMonth ,
        ForecastStatusCode ,
        ForecastStatusDescription ,
        FH.ForecastStatusID ,
        REA_Onshore ,
        FH.ForecastTypeID ,
        FT.ForecastTypeCode ,
        FT.ForecastTypeDescription
INTO    #FH
FROM    PRF_ForecastHeader FH
        INNER JOIN LKP_ForecastStatus FS WITH ( NOLOCK ) ON FS.ForecastStatusID = FH.ForecastStatusID
        INNER JOIN LKP_ForecastType FT WITH ( NOLOCK ) ON FT.ForecastTypeID = FH.ForecastTypeID
        INNER JOIN ( SELECT DISTINCT
                            ForecastID
                     FROM   TRX_ForecastDetailFlattened
                   ) WF ON WF.ForecastID = FH.ForecastID  
-------------------------------------------------------------------------------------
IF OBJECT_ID('Tempdb..#CU') IS NOT NULL 
    DROP TABLE #CU
SELECT  RELShortName ,
        [ACTUAL_END_CUSTOMER_NAME] ,
        CustomerName ,
        CustomerClass ,
        TerritoryCode ,
        CU.CustomerCode ,
        ShortName ,
        [CUSTOMER_CATEGORY]
INTO    #CU
FROM    LKP_Customer CU
        INNER JOIN ( SELECT DISTINCT
                            CustomerCode
                     FROM   TRX_ForecastDetailFlattened
                   ) WF ON CU.CustomerCode = WF.CustomerCode
        LEFT JOIN ( SELECT DISTINCT
                            [ACTUAL_END_CUSTOMER_NAME] ,
                            [Shortname] ,
                            [CUSTOMER_CATEGORY]
                    FROM    [REA_DS].[dbo].[LCUS_CUSTOMER_SHORTNAME]
                  ) CSTM ON CSTM.[ACTUAL_END_CUSTOMER_NAME] COLLATE Latin1_General_CI_AI = CU.[RELShortName] COLLATE Latin1_General_CI_AI
        LEFT JOIN PRF_Territory TE WITH ( NOLOCK ) ON TE.TerritoryID = CU.TerritoryID
        LEFT JOIN LKP_TerritoryGroup TG WITH ( NOLOCK ) ON TG.TerritoryGroupID = TE.TerritoryGroupID
                                                           AND TG.TerritoryGroupName = 'SALES REP COMPANY'
-------------------------------------------------------------------------------------
IF OBJECT_ID('Tempdb..#PR') IS NOT NULL 
    DROP TABLE #PR          
SELECT  ProductID ,
        ProductPartNumber ,
        ProductFamilyName ,
        ProductClassName
INTO    #PR
FROM    LKP_Product PR WITH ( NOLOCK )
        INNER JOIN ( SELECT DISTINCT
                            ProductID
                     FROM   TRX_ForecastDetailFlattened
                   ) ON PR.ProductID = WF.ProductID
        LEFT JOIN LKP_ProductClass PC WITH ( NOLOCK ) ON PR.ProductClassID = PC.ProductClassID
        LEFT JOIN LKP_ProductFamily PF WITH ( NOLOCK ) ON PF.ProductFamilyID = PR.ProductFamilyID
-------------------------------------------------------------------------------------                

SELECT  FH.ForecastID ,
        FH.FiscalYear ,
        FH.FiscalMonth ,
        FH.ForecastStatusCode ,
        FH.ForecastStatusDescription ,
        WF.SubTypeID ,
        WF.CustomerCode ,
        WF.ProductID ,
        WF.EndCustomerName ,
        CU.RELShortName [Master Customer 1] ,
        CASE WHEN ( WF.EndCustomerName <> '' )
             THEN CASE WHEN ( CST.[Shortname] IS NULL ) THEN CU.ShortName
                       ELSE CST.[Shortname]
                  END
             ELSE CU.ShortName
        END AS CustomerShortName ,
        CASE WHEN ( WF.EndCustomerName <> '' )
             THEN CASE WHEN ( CST.[Shortname] IS NULL )
                       THEN CASE WHEN ( CU.[CUSTOMER_CATEGORY] = 'ASU' )
                                 THEN 'AU'
                                 ELSE 'GP'
                            END
                       ELSE CASE WHEN ( CST.[CUSTOMER_CATEGORY] = 'ASU' )
                                 THEN 'AU'
                                 ELSE 'GP'
                            END
                  END
             ELSE CASE WHEN ( CU.[CUSTOMER_CATEGORY] = 'ASU' ) THEN 'AU'
                       ELSE 'GP'
                  END
        END AS CustomerCategory ,
        '' AS CustomerShortName ,
        WF.EndCustomerName AS [Disti End Customer] ,
        CU.CustomerName [Sold To Customer Name] ,
        WF.CustomerCode [Customer Sold To Number] ,
        CU.CustomerClass ,
        CASE WHEN ( CU.CustomerClass <> 'Distributor' ) THEN CU.TerritoryCode
             ELSE WF.[Sales Office]
        END AS [Sales Office] ,
        FH.REA_Onshore [Off Shore On Shore] ,
        PR.ProductFamilyName [OSC Product Family(1)] ,
        PR.ProductClassName [OSC Product Family(2)] ,
        PR.ProductPartNumber ,
        FH.ForecastTypeID ,
        FH.ForecastTypeCode ,
        FH.ForecastTypeDescription AS ForecastTypeDescription ,
        WF.SubType ,
        ISNULL(WF.CreatedDate, '') CreatedDate ,
        ISNULL(WF.ModifiedDate, '') ModifiedDate ,
        WF.ModifiedBy ,
        ISNULL([MON-3], '0') [MON-3] ,
        ISNULL([MON-2], '0') [MON-2] ,
        ISNULL([MON-1], '0') [MON-1] ,
        ISNULL([MON00], '0') [MON00] ,
        ISNULL([MON01], '0') [MON01] ,
        ISNULL([MON02], '0') [MON02] ,
        ISNULL([MON03], '0') [MON03] ,
        ISNULL([MON04], '0') [MON04] ,
        ISNULL([MON05], '0') [MON05] ,
        ISNULL([MON06], '0') [MON06] ,
        ISNULL([MON07], '0') [MON07] ,
        ISNULL([MON08], '0') [MON08] ,
        ISNULL([MON09], '0') [MON09] ,
        ISNULL([MON10], '0') [MON10] ,
        ISNULL([MON11], '0') [MON11] ,
        ISNULL([MON12], '0') [MON12] ,
        ISNULL([MON13], '0') [MON13] ,
        ISNULL([MON14], '0') [MON14]
FROM    TRX_ForecastDetailFlattened WF
        LEFT JOIN #FH AS FH ON WF.ForecastID = FH.ForecastID
        LEFT JOIN #CU AS CU ON CU.CustomerCode = WF.CustomerCode
        LEFT JOIN #PR AS PR ON PR.ProductID = WF.ProductID
        LEFT JOIN ( SELECT DISTINCT
                            [ACTUAL_END_CUSTOMER_NAME] ,
                            [Shortname] ,
                            [CUSTOMER_CATEGORY]
                    FROM    [REA_DS].[dbo].[LCUS_CUSTOMER_SHORTNAME]
                  ) CST ON WF.EndCustomerName COLLATE Latin1_General_CI_AI = CST.[ACTUAL_END_CUSTOMER_NAME]   COLLATE Latin1_General_CI_AI
WHERE   CU.RELShortName <> ''
        AND wf.CustomerCode <> '100000'
GROUP BY FH.ForecastID ,
        FH.FiscalYear ,
        FH.FiscalMonth ,
        FH.ForecastStatusCode ,
        FH.ForecastStatusDescription ,
        WF.SubTypeID ,
        WF.CustomerCode ,
        WF.ProductID ,
        WF.EndCustomerName ,
        CU.RELShortName ,
        WF.EndCustomerName ,
        CU.CustomerName ,
        WF.CustomerCode ,
        CU.CustomerClass ,
        FH.REA_Onshore ,
        PR.ProductFamilyName ,
        PR.ProductClassName ,
        PR.ProductPartNumber ,
        FH.ForecastTypeID ,
        FH.ForecastTypeCode ,
        FH.ForecastTypeDescription ,
        WF.SubType ,
        WF.ModifiedBy ,
        CST.[Shortname] ,
        CU.ShortName ,
        CST.[CUSTOMER_CATEGORY] ,
        CU.[CUSTOMER_CATEGORY] ,
        CU.TerritoryCode ,
        WF.[Sales Office] ,
        WF.CreatedDate ,
        WF.ModifiedDate

提高SQL Server 2012中Query的性能

1 个答案: