使用两个日期列创建新行并重复sum值

Question

有了这样的装备：

CREATE SEQUENCE  "SEQ_TABLE_3"  MINVALUE 1 MAXVALUE 9999999999999999999999999999 INCREMENT BY 1 START WITH 2206 NOCACHE  ORDER  NOCYCLE  NOKEEP  NOSCALE  GLOBAL ;

CREATE TABLE TABLE_3 ( 
     ID NUMBER DEFAULT SEQ_TABLE_3.nextval  NOT NULL
    ,DATE_INI   DATE NOT NULL
    ,DATE_FIN   DATE NOT NULL
    ,ELEMENTS   NUMBER
);


Insert into TABLE_3 (DATE_INI,DATE_FIN,ELEMENTS) values (to_date('19/04/01','RR/MM/DD'),to_date('19/04/10','RR/MM/DD'),3);
Insert into TABLE_3 (DATE_INI,DATE_FIN,ELEMENTS) values (to_date('19/04/01','RR/MM/DD'),to_date('19/04/10','RR/MM/DD'),2);
Insert into TABLE_3 (DATE_INI,DATE_FIN,ELEMENTS) values (to_date('19/04/01','RR/MM/DD'),to_date('19/04/10','RR/MM/DD'),1);
Insert into TABLE_3 (DATE_INI,DATE_FIN,ELEMENTS) values (to_date('19/04/01','RR/MM/DD'),to_date('19/04/10','RR/MM/DD'),5);
Insert into TABLE_3 (DATE_INI,DATE_FIN,ELEMENTS) values (to_date('19/04/01','RR/MM/DD'),to_date('19/04/10','RR/MM/DD'),4);
Insert into TABLE_3 (DATE_INI,DATE_FIN,ELEMENTS) values (to_date('19/04/01','RR/MM/DD'),to_date('19/04/10','RR/MM/DD'),6);
Insert into TABLE_3 (DATE_INI,DATE_FIN,ELEMENTS) values (to_date('19/04/01','RR/MM/DD'),to_date('19/04/10','RR/MM/DD'),9);
Insert into TABLE_3 (DATE_INI,DATE_FIN,ELEMENTS) values (to_date('19/04/01','RR/MM/DD'),to_date('19/04/10','RR/MM/DD'),1);
Insert into TABLE_3 (DATE_INI,DATE_FIN,ELEMENTS) values (to_date('19/04/01','RR/MM/DD'),to_date('19/04/10','RR/MM/DD'),2);
Insert into TABLE_3 (DATE_INI,DATE_FIN,ELEMENTS) values (to_date('19/04/01','RR/MM/DD'),to_date('19/04/10','RR/MM/DD'),4);
Insert into TABLE_3 (DATE_INI,DATE_FIN,ELEMENTS) values (to_date('19/04/01','RR/MM/DD'),to_date('19/04/10','RR/MM/DD'),5);
Insert into TABLE_3 (DATE_INI,DATE_FIN,ELEMENTS) values (to_date('19/04/01','RR/MM/DD'),to_date('19/04/10','RR/MM/DD'),6);
Insert into TABLE_3 (DATE_INI,DATE_FIN,ELEMENTS) values (to_date('19/04/01','RR/MM/DD'),to_date('19/04/10','RR/MM/DD'),2);
Insert into TABLE_3 (DATE_INI,DATE_FIN,ELEMENTS) values (to_date('19/04/01','RR/MM/DD'),to_date('19/04/10','RR/MM/DD'),7);
commit;

我正试图得到这样的结果：

​

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这个想法是让date_ini和date_fin重新创建具有日期值的行，日期值将在date_ini和date_fin以及所有elements之和之间。老实说，我不知道怎么开始

Answer 1

下面这样的子查询重构也可以这样做。

这里的演示

        WITH data
         AS (SELECT date_ini + column_value - 1 AS dates,
                    date_ini,
                    date_fin,
                    elements
             FROM   table_3
                    cross join TABLE(Cast(MULTISET (SELECT LEVEL
                                              FROM   dual
                                              CONNECT BY date_ini + LEVEL <=
                                                         date_fin + 1
                                                   )
                                          AS
         sys.ODCINUMBERLIST)))
    SELECT dates,
           date_ini,
           date_fin,
           SUM(elements)
    FROM   data
    GROUP  BY dates,
              date_ini,
              date_fin
    ORDER  BY dates,
              date_ini,
              date_fin;