查询时间执行时间太长

Question

我使用此查询来计算年份。但是花了太多时间才能执行。

如何优化它？

SELECT T.[Sales_Organization],
       T.[CD_DossierMagnitude],
       T.[DS_DossierMagnitude],
       T.[Sales_Product_Name_N3],
       T.[Sales_Product_Name_N2],
       T.[Sales_Product_Name_N1],
       T.[Market_Segment_Name_N2],
       T1.*
FROM   stg.Fact_EPV_SEFPRO_DC T
       CROSS APPLY (SELECT SUM([QTY])     AS QTY_YTD,
                           SUM([QTY_UoM]) AS QTY_UoM_YTD,
                           SUM([PNV_LC])  AS PNV_LC_YTD,
                           SUM([Vmvu])    AS Vmvu_YTD
                    FROM   stg.Fact_DC
                    WHERE  [Delivery_Year] = T.[Delivery_Year]
                           AND Delivery_month <= t.Delivery_month
                           AND Sales_Organization = T.Sales_Organization
                           AND Sales_Product_Name_N3 = T.Sales_Product_Name_N3
                           AND Sales_Product_Name_N2 = T.Sales_Product_Name_N2
                           AND Sales_Product_Name_N1 = T.Sales_Product_Name_N1
                           AND Market_Segment_Name_N2 = T.Market_Segment_Name_N2
                           AND Market_Grp = T.Market_Grp
                           AND Product_Name_SOA = T.Product_Name_SOA
                           AND Doc_Currency = T.Doc_Currency) t1