这是一个正确使用'分区'的问题吗？

Question

我想为此使用分析，因为我有其他几个相似的统计数据，我想要 报告。

问：使用Oracle Analytics，我怎样才能在每个机场只有一行？

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 

预期的效果

Airport Airport_count A_G_WEIGHT 
ATL  2    35 
SFO  3    90 

Answer 1

正如Wernfried说，你找DISTINCT关键字。

既然 “乘客ID” 列没有关系，并希望避免重复，你必须把它这样：

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