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Home -> Community -> Mailing Lists -> Oracle-L -> Re: SQL Brain Teaser Challenge
Does an in-line view do the trick?
select * from
(select id, parentid, nodeorder, description
from treenode
start with parentid=0 connect by prior id = parentid)
order by nodeorder;
Jay
>>> sorr_at_rightnow.com 11/05/02 12:24PM >>>
Challenge: present SQL results hierarchically and sort the nodes. Use sort
column without changing data. Here's the DDL/DML to start:
create table treenode (
id number not null constraint pk_treenode primary key, parentid number not null, nodeorder number not null, description varchar2(20) null); insert into treenode values(1,0,0,'top folder'); insert into treenode values(9,1,0,'1st subfolder'); insert into treenode values(7,1,2,'3rd subfolder'); insert into treenode values(2,1,1,'2nd subfolder'); insert into treenode values(8,7,1,'folder 3 item 2'); insert into treenode values(6,2,3,'folder 2 item 3'); insert into treenode values(5,7,0,'folder 3 item 1');insert into treenode values(3,2,2,'folder 2 item 2'); insert into treenode values(4,2,1,'folder 2 item 1');
ID PARENTID NODEORDER DESCRIPTION
---------- ---------- ---------- --------------------
1 0 0 top folder
9 1 0 1st subfolder
7 1 2 3rd subfolder
8 7 1 folder 3 item 2
5 7 0 folder 3 item 1
2 1 1 2nd subfolder
6 2 3 folder 2 item 3
3 2 2 folder 2 item 2
4 2 1 folder 2 item 1
-----------------------------------------------------
Desired SQL statement results:
ID PARENTID NODEORDER DESCRIPTION
---------- ---------- ---------- --------------------
1 0 0 top folder
9 1 0 1st subfolder
2 1 1 2nd subfolder
4 2 1 folder 2 item 1
3 2 2 folder 2 item 2
6 2 3 folder 2 item 3
7 1 2 3rd subfolder
5 7 0 folder 3 item 1
8 7 1 folder 3 item 2
-----------------------------------------------------
Kudos to anyone who can figure out how to do this via SQL.
Steve Orr
Bozeman, Montana
-- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Orr, Steve INET: sorr_at_rightnow.com Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). **DISCLAIMER This e-mail message and any files transmitted with it are intended for the use of the individual or entity to which they are addressed and may contain information that is privileged, proprietary and confidential. If you are not the intended recipient, you may not use, copy or disclose to anyone the message or any information contained in the message. If you have received this communication in error, please notify the sender and delete this e-mail message. The contents do not represent the opinion of D&E except to the extent that it relates to their official business. -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Jay Hostetter INET: jhostetter_at_decommunications.com Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).Received on Tue Nov 05 2002 - 12:59:24 CST
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