hive union all嵌套使用

select id from (
	select a.id from 
	(
	select 1 as id from dua
	union all 
	select 2 as id from dua
	) a join 
	(select 4 as id from dua) f on a.id =f.id
union all 
	select b.id from 
	(
	select 1 as id from dua
	union all 
	select 2 as id from dua
	) b join 
	(select 3 as id from dua) e on b.id =e.id
) c