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09.17.2008 at 09:37AM PDT, ID: 23739352
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9.5

CONNECT BY to build a tree

Asked by ewang1205 in Oracle Database

Tags:

I have attached the insert statement and table script.  The following is the base select and BAD RESULT.  What I like is the node_level=3 to order by name (see GOOD RESULT).   Please node, I like the each city to be after their states.  Thanks!!


SELECT    name, tree_id, node_level, parent_tree_id       FROM temp
START WITH parent_tree_id = 0
CONNECT BY PRIOR tree_id = parent_tree_id

BAD RESULT
NAME      TREE_ID      NODE_LEVEL      PARENT_TREE_ID
USA      1      1      0
CA      20      2      1
SAN JOSE      101      3      20
SAN DIEGO      201      3      20
LA      301      3      20
NY      30      2      1

GOOD RESULT
NAME      TREE_ID      NODE_LEVEL      PARENT_TREE_ID
USA      1      1      0
CA      20      2      1
LA      301      3      20
SAN DIEGO      201      3      20
SAN JOSE      101      3      20
NY      30      2      1
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drop table temp;
create table temp(tree_id number, parent_tree_id number, name varchar2(20), node_level varchar2(20));
 
insert into temp values (1, 0, 'USA', 1);
insert into temp values (20, 1, 'CA', 2);
insert into temp values (30, 1, 'NY', 2);
insert into temp values (101, 20, 'SAN JOSE', 3);
insert into temp values (201, 20, 'SAN DIEGO', 3);
insert into temp values (301, 20, 'LA', 3);
commit;
 
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[+][-]09.17.2008 at 10:57AM PDT, ID: 22501657

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[+][-]09.17.2008 at 11:07AM PDT, ID: 22501771

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About this solution

Zone: Oracle Database
Tags: oracle
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Solution Provided By: sventhan
Participating Experts: 1
Solution Grade: A
 
 
[+][-]09.17.2008 at 11:36AM PDT, ID: 22502124

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[+][-]09.19.2008 at 05:10PM PDT, ID: 22527083

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[+][-]09.22.2008 at 07:16AM PDT, ID: 22540184

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