从 UNION ALL 结果集中获取总和

Question

我有一个 SQL 查询，它在 UNION ALL 查询中从 window 时间段的每一天获取几个数据点，然后在结果集中对每一天的数据求和。

我要添加到结果集中的是结果集中所有日期底部的总计。我尝试使用 ROLLUP（使用 GROUP BY 语句）但没有成功，而且我一直收到错误 ORA-00933: SQL command not properly ended.

不确定是否有使用 UNION ALL 进行 ROLLUP 的技巧，或者它是否根本不起作用。我还尝试了一个临时 table，然后用临时 table 的总和执行 UNION ALL，但这看起来太复杂了（而且我也无法让它工作）。

有人可以帮助指导我吗？这是我的工作代码：

SELECT /*+ USE_HASH(x) */
ACTIVITY_DAY
, SUM(ORDERED_UNITS)
, SUM(ORDERED_AMT)
FROM (
    SELECT ACTIVITY_DAY,ORDERED_UNITS,ORDERED_AMT FROM D_DAILY_ORDERS
        WHERE REGION_ID = 1
        AND MARKETPLACE_ID = 1
        AND ACTIVITY_DAY BETWEEN TO_DATE('20160409','YYYYMMDD') AND TO_DATE('20160505','YYYYMMDD')
        AND ID IN ('B019433MGC', 'B019433O4C', 'B00STUX0F0', 'B017SL40S6', 'B00ZHJDJ5W', 'B00STUX276', 'B017SL44RI', 'B00ST415S0', 'B00ST414O0')
    UNION ALL
    SELECT ACTIVITY_DAY,ORDERED_UNITS,ORDERED_AMT FROM D_DAILY_ORDERS
        WHERE REGION_ID = 1
        AND MARKETPLACE_ID = 1
        AND ACTIVITY_DAY BETWEEN TO_DATE('20160501','YYYYMMDD') AND TO_DATE('20160505','YYYYMMDD')
        AND ID IN ('B007V4YR5M', 'B00BHQ9CHI')
) x
GROUP BY ACTIVITY_DAY
ORDER BY ACTIVITY_DAY
;

Answer 1

如果我理解得很好，ROLLUP 是正确的方法；您可能遇到了一些语法错误：

SQL> SELECT
  2    ACTIVITY_DAY
  3  , SUM(ORDERED_UNITS)
  4  , SUM(ORDERED_AMT)
  5  FROM (
  6      select sysdate   as ACTIVITY_DAY, 1 as ORDERED_UNITS, 10 as ORDERED_AMT from dual union all
  7      select sysdate-1 as ACTIVITY_DAY, 2 as ORDERED_UNITS, 20 as ORDERED_AMT from dual union all
  8      select sysdate-1 as ACTIVITY_DAY, 2 as ORDERED_UNITS, 20 as ORDERED_AMT from dual
  9  ) x
 10  GROUP BY rollup(ACTIVITY_DAY)
 11  ORDER BY ACTIVITY_DAY
 12  ;

ACTIVITY_ SUM(ORDERED_UNITS) SUM(ORDERED_AMT)
--------- ------------------ ----------------
15-MAG-16                  4               40
16-MAG-16                  1               10
                           5               50

从 UNION ALL 结果集中获取总和

Getting the sum from a UNION ALL result set

sql

oracle

union

rollup