Question

我知道这个问题有点微不足道但我在编写下面的例子中的SQL时遇到了困难。如第一个表所示，是我生成的结果，它们可以用于分析，

REGION  SUBREGION    SUM
------  ---------    ------
CORP    CORP1       5  
CORP    CORP2       10 
CORP    CORP3       5 
SB      SB1         10 
SB      SB2         10 
MID     null        10 
LARGE   null        20

但是对于摘要报告，我需要显示结果，如第二个表所示。有线索吗？

REGION  SUM
------  ----
CORP    20
CORP1   5
CORP2   10
CORP3   5
SB      20
SB1     10
SB2     10
MID     10
LARGE   20

Answer 1

只需将现有的GROUP BY更改为GROUPING SET：

SELECT
   Coalesce(subregion, region) AS region,
   Sum(column)
FROM mytable
GROUP BY GROUPING SETS(region, subregion)
HAVING Coalesce(subregion, region) IS NOT NULL

Answer 2

听起来你需要通过不同的字段聚合同一个表，但要把它们都拿回来，好像它是一个字段一样。想到的解决方案是UNION

select sum() as sum, REGION as sf from table group by REGION
union ALL
select sum() as sum, SUB_REGION as sf from table group by SUB_REGION;

希望有所帮助

基于丹的问题，我补充一点，如果你不想加入vals，只需取出总和并分组并做直接联合

 select REGION as sf from table 
    union ALL
    select  SUB_REGION as sf from table;

编辑：还有一个想法，也许当你首先进行查询时，你可能想要查看ROLLUP的概念作为你的组bu和agg函数的附加条款，可能有助于一次解决这个问题。

Answer 3

尝试使用OLAP函数rollup和grouping，如下所示：

select 
  nvl(subregion, region) region, sum("sum")
from  t
group by region, rollup(subregion)
having case when count(*) = 1 then 0 else 1 end = grouping(subregion);

在上面，

having case when count(*) = 1 then 0 else 1 end = grouping(subregion);

如果该区域只有一行，则上面排除了汇总行，因此没有重复。

另外，请避免在标识符中使用保留关键字，例如sum或count。

演示：

SQL> with t(REGION ,SUBREGION    ,s) as (
  2  select 'CORP'   , 'CORP1'   , 5  from dual union all
  3  select 'CORP'   , 'CORP2'   , 10 from dual union all
  4  select 'CORP'   , 'CORP3'   , 5  from dual union all
  5  select 'SB'        ,'SB1'          ,10  from dual union all
  6  select 'SB'        ,'SB2'          ,10  from dual union all
  7  select 'MID'       , null   , 10    from dual union all
  8  select 'LARGE'  ,  null   , 20   from dual
  9  )
 10  select
 11    nvl(subregion, region) region, sum(s)
 12  from  t
 13  group by region, rollup(subregion)
 14  having case when count(*) = 1 then 0 else 1 end = grouping(subregion);

REGIO     SUM(S)
----- ----------
SB1           10
SB2           10
SB            20
MID           10
CORP1          5
CORP2         10
CORP3          5
CORP          20
LARGE         20

9 rows selected.

SQL>

Answer 4

通过查询执行相同的组，但尝试使用ROLLUP分组：

像（未经测试）的东西：

select region, subregion, sum(some_column) as sum
from some_table
group by rollup(region, subregion)
order by region, subregion;

Oracle SQL分组元素

4 个答案: