Question

我在外部查询和内部查询中都有一个SUM聚合函数，这需要在外部查询或内部查询中最小化到一个SUM函数。我应该group by item, loc, dur, startdate，因为我会得到重复的值。

我尝试使用WITH子句，但是没有用。有人告诉我，我可以使用row_Number分析函数来解决此问题，但在这里不知道如何使用。

L_Week_Start_Date = TO_DATE('02/DEC/2018', 'DD/MOM/YYYY')
SELECT Item,
       Loc,
       Dur,
       StartDate,
       SUM(P1) P1,
       SUM(P8) P8,
       SUM(P15) P15,
       SUM(P22) P22
FROM
  (SELECT DISTINCT SkuXFcst.Item Item,
                   SkuXFcst.Loc Loc,
                   '10080' Dur,
                           L_Week_Start_Date StartDate,
                           (CASE
                                WHEN SkuXFcst.StartDate BETWEEN L_Week_Start_Date 
                                                            AND L_Week_Start_Date + 6 
                                      THEN SUM(SkuXFcst.Qty) OVER(PARTITION BY SkuXFcst.Item, SkuXFcst.Loc)
                                ELSE 0
                            END) P1,
                           (CASE
                                WHEN SkuXFcst.StartDate BETWEEN L_Week_Start_Date + 7 
                                                            AND L_Week_Start_Date + 13 
                                       THEN SUM(SkuXFcst.Qty) OVER(PARTITION BY SkuXFcst.Item, SkuXFcst.Loc)
                                ELSE 0
                            END) P8,
                           (CASE
                                WHEN SkuXFcst.StartDate BETWEEN L_Week_Start_Date + 14 
                                                           AND L_Week_Start_Date + 20 
                                        THEN SUM(SkuXFcst.Qty) OVER(PARTITION BY SkuXFcst.Item, SkuXFcst.Loc)
                                ELSE 0
                            END) P15,
                           (CASE
                                WHEN SkuXFcst.StartDate BETWEEN L_Week_Start_Date + 21 
                                                            AND L_Week_Start_Date + 27 
                                       THEN SUM(SkuXFcst.Qty) OVER(PARTITION BY SkuXFcst.Item, SkuXFcst.Loc)
                                ELSE 0
                            END) P22
   FROM SCPOMGR.SkuExternalFcst SkuXFcst,
        SCPOMGR.Sku Sku
   WHERE SkuXFcst.Item = Sku.Item
     AND SkuXFcst.Loc = Sku.Loc
     AND ((SkuXFcst.StartDate BETWEEN Sku.U_Range_Start AND Sku.U_Range_End)
          OR Sku.U_Range_Start = TO_DATE('01/01/1970', 'DD/MM/YYYY')))
GROUP BY Item,
         Loc,
         Dur,
         StartDate

Answer 1

create table SkuXFcst as
SELECT 21257 as item, 903 as loc, TO_DATE('2018-12-11')as startdate, 14400 as dur , 100 as qty from dual union all
SELECT 21257, 664, TO_DATE('2018-12-10'), 14400, 100 from dual union all
SELECT 11064, 101, TO_DATE('2018-11-26'), 43200, 300 from dual union all
SELECT 21257, 315, TO_DATE('2018-12-01'), 14400, 100 from dual union all
SELECT 21257, 314, TO_DATE('2018-12-10'), 14400, 100 from dual union all
SELECT 21257, 903, TO_DATE('2018-12-10'), 14400, 1000 from dual union all
SELECT 19510, 502, TO_DATE('2018-12-20'), 14400, 50  from dual union all
SELECT 19510, 502, TO_DATE('2018-12-20'), 14400, 500 from dual union all
SELECT 19507, 615, TO_DATE('2018-12-20'), 14400, 50  from dual union all
SELECT 19507, 615, TO_DATE('2018-12-22'), 14400, 50  from dual union all
SELECT 19510, 502, TO_DATE('2018-12-01'), 0    , 0   from dual ;



SELECT  item,
        loc,
        dur,
        SUM(CASE
              WHEN SkuXFcst.StartDate BETWEEN  to_date('2018-12-02','YYYY-MM-DD')    
                                      AND      to_date('2018-12-02','YYYY-MM-DD')+ 6 THEN SkuXFcst.Qty
              ELSE 0
            END) AS P1,
        SUM(CASE
              WHEN SkuXFcst.StartDate BETWEEN  to_date('2018-12-02','YYYY-MM-DD') + 7 
                                      AND      to_date('2018-12-02','YYYY-MM-DD') + 13 THEN SkuXFcst.Qty
              ELSE 0
            END) P8,
        SUM(CASE
              WHEN SkuXFcst.StartDate BETWEEN  to_date('2018-12-02','YYYY-MM-DD') + 14 
                                      AND      to_date('2018-12-02','YYYY-MM-DD') + 20 THEN SkuXFcst.Qty
              ELSE 0
            END) P15,
        SUM(CASE
              WHEN SkuXFcst.StartDate BETWEEN  to_date('2018-12-02','YYYY-MM-DD') + 21 
                                      AND      to_date('2018-12-02','YYYY-MM-DD') + 27 THEN SkuXFcst.Qty
              ELSE 0
            END) P22
from    SkuXFcst
GROUP   BY item,
           loc,
           dur

SUM聚合函数问题

1 个答案: