RE: SQL Brain Teaser Challenge

From: Orr, Steve <sorr_at_rightnow.com>
Date: Tue, 05 Nov 2002 11:09:23 -0800
Message-ID: <F001.004FC0CF.20021105110923@fatcity.com>

Nope...

(select id, parentid, nodeorder, description from treenode
start with parentid=0 connect by prior id = parentid) order by nodeorder;

        ID PARENTID NODEORDER DESCRIPTION

---------- ---------- ---------- --------------------
         1          0          0 top folder
         9          1          0 1st subfolder
         5          7          0 folder 3 item 1
         8          7          1 2nd item, 3rd folder
         2          1          1 2nd subfolder
         4          2          1 folder 2 item 1
         7          1          2 3rd subfolder
         3          2          2 folder 2 item 2
         6          2          3 folder 2 item 3

-----Original Message-----
Sent: Tuesday, November 05, 2002 11:52 AM To: ORACLE-L_at_fatcity.com; Orr, Steve

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');

---

Here's the data presented hierachically without the desired sort: select * from treenode
start with parentid=0 connect by prior id = parentid;

        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: 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).

Received on Tue Nov 05 2002 - 13:09:23 CST