PERMINTAAN ORACLE DB

Di Oracle, Anda dapat menggunakan listagg() , tetapi tidak memiliki distinct pilihan. Jadi, gunakan subquery dan dua tingkat agregasi:

select listagg(id, ',') within group (order by id) as id, name, sum(cnt)
from (select id, name, count(*) as cnt
      from t
      group by id, name
     ) x
group by name;