connect by prior

http://www.blogjava.net/freeman1984/archive/2011/05/06/349668.html

http://www.blogjava.net/freeman1984/archive/2011/05/06/349668.html

select * from branch connect by prior branch_id = parent_branch_id start with branch_id ='123' or  branch_id ='124';


select * from branch connect by  branch_id = prior parent_branch_id ;