这是正确使用 'partition by' 的问题吗？

Question

我想为此使用分析，因为我想要其他几个类似的统计数据报告。

问：使用 Oracle Analytics，我怎样才能得到每个机场的一行？

with detail_records as 
(select 1 as passenger_id, 'ATL' as airport, 'E4' as gate, 10  as luggage_weight  from dual union all
 select 2 as passenger_id, 'ATL' as airport, 'E4' as gate, 25  as luggage_weight  from dual union all
 select 2 as passenger_id, 'SFO' as airport, 'E4' as gate, 20  as luggage_weight  from dual union all
 select 3 as passenger_id, 'SFO' as airport, 'E4' as gate, 30  as luggage_weight  from dual union all
 select 4 as passenger_id, 'SFO' as airport, 'E4' as gate, 40  as luggage_weight  from dual
 )
 select  airport,
         count(*) over (partition by airport) as airport_count,
         sum(luggage_weight) over (partition by airport, gate) as a_g_weight
 from detail_records
 where gate='E4'

结果

AIRPORT  AIRPORT_COUNT   A_G_WEIGHT
ATL      2              35
ATL      2              35
SFO      3              90
SFO      3              90
SFO      3              90

想要的结果

 Airport  Airport_count   A_G_WEIGHT
 ATL       2              35
 SFO       3              90

Answer 1

正如 Wernfried 所说，您正在寻找 DISTINCT 关键字。

由于 "passenger ID" 列无关紧要，并且要避免重复，因此必须这样称呼它：

with detail_records as 
(select 1 as passenger_id, 'ATL' as airport, 'E4' as gate, 10  as luggage_weight  from dual union all
 select 2 as passenger_id, 'ATL' as airport, 'E4' as gate, 25  as luggage_weight  from dual union all
 select 2 as passenger_id, 'SFO' as airport, 'E4' as gate, 20  as luggage_weight  from dual union all
 select 3 as passenger_id, 'SFO' as airport, 'E4' as gate, 30  as luggage_weight  from dual union all
 select 4 as passenger_id, 'SFO' as airport, 'E4' as gate, 40  as luggage_weight  from dual
 )
 select  distinct airport,
         count(*) over (partition by airport) as airport_count,
         sum(luggage_weight) over (partition by airport, gate) as a_g_weight
 from detail_records
 where gate='E4'

Answer 2

使用简单的 GROUP BY 查询

select  airport,
        count(*) as airport_count,
        sum(luggage_weight) as a_g_weight
from detail_records
where gate='E4'
group by airport

这是正确使用 'partition by' 的问题吗？

Is this a matter of using 'partition by' correctly?

oracle

analytics

oracle11g