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[PL/SQL]如何实现比较复杂的分组、小计与合计

[PL/SQL]如何实现比较复杂的分组、小计与合计
 
--测试代码
create table t_dist
(
  TYPE_CD    NUMBER,
  BUYER_ID   VARCHAR2(50),
  ORDER_DT   DATE,
  SO_ID      VARCHAR2(50) not null,
  STOCK_ID   VARCHAR2(50) not null,
  UNIT_PRICE NUMBER,
  DISCOUNT   NUMBER,
  QTY        NUMBER
);

truncate table t_dist;
insert into t_dist values(1,'CN1001',to_date('2008-04-01','yyyy-mm-dd'),'S9001','29110311',50,10,8);
insert into t_dist values(1,'CN1001',to_date('2008-04-02','yyyy-mm-dd'),'S9002','29110312',60,20,2);
insert into t_dist values(1,'CN1001',to_date('2008-04-03','yyyy-mm-dd'),'S9003','29110313',70,15,3);
insert into t_dist values(2,'CN1001',to_date('2008-04-04','yyyy-mm-dd'),'S9004','29110312',60,15,5);
insert into t_dist values(2,'CN1001',to_date('2008-04-05','yyyy-mm-dd'),'S9005','29110311',70,10,6);
insert into t_dist values(3,'CN1001',to_date('2008-04-06','yyyy-mm-dd'),'S9006','29110313',55,20,4);
insert into t_dist values(3,'CN1001',to_date('2008-04-06','yyyy-mm-dd'),'S9007','29110311',40,10,3);
insert into t_dist values(3,'CN1001',to_date('2008-04-07','yyyy-mm-dd'),'S9008','29110312',50,50,5);
insert into t_dist values(3,'CN1001',to_date('2008-04-07','yyyy-mm-dd'),'S9009','29110313',80,10,2);
insert into t_dist values(1,'CN1001',to_date('2008-04-08','yyyy-mm-dd'),'S9010','29110311',65,10,1);
commit;

 

 
即计算按stock_id,type_cd,distount分组,计算每个产品的销售额(qty*unit_price)及销售百分比,并有小计
 
STOCK_ID        TYPE_CD        DISCOUNT     AVG_PRICE      SUM_TOT          PCT
-------------------------------------------------------------------------------------------------
29110311        1                        10              57.50             465              46.27%
29110311        2                        10              70.00             420              41.79%
29110311        3                        10              40.00             120              11.94%
小计                                                              55.83             1005            100.00%
29110312        1                        20              60.00             120              17.91%
29110312        2                        15              60.00             300              44.78%
29110312        3                        50              50.00             250              37.31%
小计                                                              56.67             670              100.00%
29110313        1                        15              70.00             210              35.59%
29110313        3                        10              80.00             160              27.12%
29110313        3                        20              55.00             220              37.29%
小计                                                              68.33             590              100.00%

 


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