>What I'm trying to accomplish is to order the results such that after
>stacking the data for all results for a certain category, that the next
>results to be stacked should be those whose parent = the former category,
>then move on to the next category, etc. How do I do this?
It's a tree. See http://www.artfulsoftware.com/mysqlbook/sampler/mysqled1ch20.html and
http://www.artfulsoftware.com/infotree/treequeryperformance.pdf.
PB
-----
-----Original Message-----
>From: Victor Subervi <victorsubervi@stripped>
>Sent: Aug 24, 2010 1:14 PM
>To: mysql@stripped
>Subject: Complex Select Query
>
>Hi;
>I have the following query:
>
>select * from spreadsheets s join products p on p.Item=s.Item join
>categories c on p.Category=c.ID where s.Client=%s order by p.category,
>c.parent;
>
>mysql> describe products;
>+-------------+--------------+------+-----+---------+----------------+
>| Field | Type | Null | Key | Default | Extra |
>+-------------+--------------+------+-----+---------+----------------+
>| ID | int(4) | NO | PRI | NULL | auto_increment |
>| Category | int(3) | YES | | NULL | |
>| Item | varchar(20) | YES | UNI | NULL | |
>| Description | varchar(255) | YES | | NULL | |
>| UOM | varchar(20) | YES | | NULL | |
>| Cost | float(7,2) | YES | | NULL | |
>+-------------+--------------+------+-----+---------+----------------+
>6 rows in set (0.00 sec)
>
>mysql> describe categories;
>+----------+-------------+------+-----+---------+----------------+
>| Field | Type | Null | Key | Default | Extra |
>+----------+-------------+------+-----+---------+----------------+
>| ID | int(3) | NO | PRI | NULL | auto_increment |
>| Category | varchar(20) | YES | UNI | NULL | |
>| Parent | varchar(20) | YES | | NULL | |
>+----------+-------------+------+-----+---------+----------------+
>
>What I'm trying to accomplish is to order the results such that after
>stacking the data for all results for a certain category, that the next
>results to be stacked should be those whose parent = the former category,
>then move on to the next category, etc. How do I do this?
>TIA,
>Victor
