Hana sql如果左侧包含空值，右侧包含值，则在sql中向左移动单元格

Question

我在下面的链接中描述了相同的问题，但是它已提供给sql server，但我需要Hana db的解决方案move cells left in sql if left contains null and right contains value

Answer 1

嗯。 。 。在Hana中，我认为您可以使用unpivot使用union all，然后使用row_number()和聚合：

select id,
       max(case when order = 1 then val end) as a,
       max(case when order = 2 then val end) as b,
       . . .
from (select id, val, row_number() over (partition by id rder by ord) as as
      from ((select 1 as ord, id, a as val from t) union all
            (select 2 as ord, id, b as val from t) union all
            . . . 
           ) t
      where val is not null
     ) t
group by id;

这里id指的是唯一地指定每一行的列或列组。