oracle递归查询

select level, id, parent_id, name, parent_name
from table
start with id = 1
connect by prior id = parent_id
order by level;

select level, id, parent_id, name, parent_name
from table
start with id = 1
connect by prior parent_id = id
order by level;

select id, parent_id, name, parent_name, sys_connect_by_path(name, '/') path
from table
start with id = 1
connect by prior parent_id = id