Print parent to child link or path from the same table

Question

create table dummy(nodeid number, parentid number, nodename varchar2(20));
insert into dummy values(100,-1,'homegoods');
insert into dummy values(101,100,'kitchen');
insert into dummy values(102,101,'skillet');
select * from dummy gives:
nodeid     parentid   node_name
100         -1         HOMEGOODS
101         100       KITCHEN
102         101       SKILLETnote: parent id is the node id in the same table except for the top node.
select nodeid, nodename, 'i want complete path from parent to child here' as path from dummy where nodeid = 102
expected result
nodeid   name     path
102       skillet     homegoods>kitchen>skillethow can I do this ?
thanks

Answer 1

I thought it worked but I guess i am stuck in with real data . Please bear with me. I have never done hierarchical queries -
there are more ids and fields that I have to put in the condition so here are the new create/insert sample stmnts.
drop table dummy;
create table dummy(hdr_id number,node_id number, config_item_id number, parent_config_item_id number,ps_node_name varchar2(20));
insert into dummy values(35981400,     21400,     24547505,     -1,     'AT2200-10H');
insert into dummy values(35981400,     21420,     24547506,     24547505,     'AT2200-10H-UWMOD');
insert into dummy values(35981400,     37020,     24547564,     24547506,     'Corona Treater');
insert into dummy values(35981400,     37021,     24547565,     24547564,     'None');
insert into dummy values(35981400,     37024,     24547566,     24547506,     'Corona Type');
insert into dummy values(35981400,     1877321,25766779,     24547566,     'None');
select ps_node_name name,'path' from dummy where hdr_id = 35981400
--I have to have hdr_id=something as a condition as there are numerous rows with different ids.
so when I query for names in one hrd_id, I should get all names in that session, with paths linking parent to child upto current level.
expected result :
AT2200-10H     
AT2200-10H-UWMOD        AT2200-10H>AT2200-10H-UWMOD
Corona Treater        AT2200-10H>AT2200-10H-UWMOD>Corona Treater
None                        AT2200-10H>AT2200-10H-UWMOD>Corona Treater>None
Corona Type        AT2200-10H>AT2200-10H-UWMOD>Corona Type
None                        AT2200-10H>AT2200-10H-UWMOD>Corona Type>None
sorry for the confusion.
Edited by: OAF-dev on Nov 18, 2009 4:24 PM