Cara mengubah kolom menjadi baris di Oracle sql 11G

Coba ini:

select listagg(A,'  ') within group (order by A) as Names
from test

Dalam kasus Anda, kuerinya seperti:

select listagg(column_name,'  ')  within group (order by column_name) as column_name
from all_tab_cols 
where table_name='TABLE_NAME' ;