oracle列转行

 

with temp as(

select 'China' nation ,'Guangzhou' city from dual union all

select 'China' nation ,'Shanghai' city from dual union all

select 'China' nation ,'Beijing' city from dual union all

select 'USA' nation ,'New York' city from dual union all

select 'USA' nation ,'Bostom' city from dual union all

select 'Japan' nation ,'Tokyo' city from dual

)

select nation,listagg(city,',') within GROUP (order by city)

from temp

group by nation