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06.04.2004 at 04:39AM PDT, ID: 21013369
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7.8

How do build category / subcategory path with min SQL queries?

Asked by vahan in MySQL Server

Tags: , , , ,

I have the following table structure:

CREATE TABLE `categories` (
  `id` int(6) unsigned NOT NULL auto_increment,
  `parent_id` int(6) unsigned NOT NULL default '0',
  `name` varchar(100) NOT NULL default '',
  `features` varchar(255) NOT NULL default '',
  `description` text NOT NULL,
  `ordering_id` int(6) unsigned NOT NULL default '0',
  `active` enum('yes','no') NOT NULL default 'yes',
  PRIMARY KEY  (`id`),
  UNIQUE KEY `id` (`id`)
)

Parent categories have their parent_id set to 0, and sub categories have it set to their parent's id.

Anyone knows a neat way of getting the whole path from parent to the last subcategory with a single or min number of queries? F.E.,

"\ parent \ sub category 1 \ sub category 2" kind of query, which gets me the names and id's of parent and sub category 1 if I supply the sub category2's id to the query

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[+][-]06.04.2004 at 06:23AM PDT, ID: 11232378

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[+][-]06.05.2004 at 02:22AM PDT, ID: 11238772

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[+][-]06.05.2004 at 02:23AM PDT, ID: 11238777

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[+][-]06.05.2004 at 05:30PM PDT, ID: 11241695

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About this solution

Zone: MySQL Server
Tags: sql, subcategory, category, parent_id, path
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Solution Provided By: dignified
Participating Experts: 2
Solution Grade: A
 
 
 
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