Hierarchical Query Sort help needed in 9i (9.2.0.6)

Question

Hello all, hope you guys are far away from IKE (it hit us pretty bad last weekend), anyway come to point
My requirement is data sorted by name is such a way after parent show its childs (if exists) i.e first sort parents and then by childs within parants
I am expecting this
1     BBQU-1
2     BBQU-1 Sub event 1
3     BBQU-1 Sub event 2
10     BBQU-1 Sub event 3
6     BBQU-1 Birthday
5     BBQU-1 Advance
7     BBQU-2
4     BBQU-2 Sub event
from
1     BBQU-1     
5     BBQU-1 Advance     
2     BBQU-1 Sub event 1     1
3     BBQU-1 Sub event 2     1
10     BBQU-1 Sub event 3     1
6     BBQU-1 Birthday     
7     BBQU-2     
4     BBQU-2 Sub event     7
Here is the script for table and data.
create table no_more_ike (event_id number, event_name varchar2(30), subevent_id number);
insert into no_more_ike values (1, 'BBQU-1', null);
insert into no_more_ike values (5, 'BBQU-1 Advance', null);
insert into no_more_ike values (2, 'BBQU-1 Sub event 1', 1);
insert into no_more_ike values (3, 'BBQU-1 Sub event 2', 1);
insert into no_more_ike values (10, 'BBQU-1 Sub event 3', 1);
insert into no_more_ike values (6, 'BBQU-1 Birthday', null);
insert into no_more_ike values (7, 'BBQU-2', null);
insert into no_more_ike values (4, 'BBQU-2 Sub event', 7);
commit;
Thanks a lot

Answer 1

Is this OK?
select
   event_id,
   event_name,
   subevent_id
from no_more_ike
start with SUBEVENT_ID is null
connect by prior EVENT_ID = SUBEVENT_ID
order by decode(subevent_id, null, event_id, subevent_id) asc;