I Oracle 11g kan du använda LISTAGG() funktion:
select id,
number,
listagg(letter, ', ') within group(order by id, number) as letter
from yourtable
group by id, number;
I Oracle 11g kan du använda LISTAGG() funktion:
select id,
number,
listagg(letter, ', ') within group(order by id, number) as letter
from yourtable
group by id, number;