Question

这是数据的样子：

   master_id id states
    1         1  NJ, PA, IL
    1         2  IL, NJ, NY, CA
    1         3  MA, DC

我正在尝试获取master_id级别的状态摘要（注意，已删除NJ和IL的重复项），即：

master_id states
1         NJ, PA, IL, NY, CA, MA, DC

有什么建议可以做到吗？当然，对于所有此类情况，这都必须是动态的，这些状态仅是示例。

Answer 1

要将它们加入一起，您需要listagg：

select master_id, listagg(states, ', ') as states
from MyTable
group by master_id;

但是首先我们将它们拆分，然后使用不同的字符来删除这些重复项：

select master_id, listagg(distinct new_state, ', ') as states
from
(
  select master_id, TRIM(SPLIT_PART(states,',', 1)) as new_state
  from mytable
) x1
group by master_id

我想您要订购吗？好的，让我们这样做：

select master_id, 
       listagg(distinct new_state, ', ')
         within group (order by new_state) as states
from
(
  select master_id, TRIM(SPLIT_PART(states,',', 1)) as new_state
  from mytable
) x1
group by master_id

将多行汇总为一

1 个答案: