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Groupe MySQL par colonnes multiples sur les tables jointes (WordPress)

2009-06-11 6 views
2

J'ai ce problème de joindre plusieurs tables et de regrouper par colonnes sur ces tables. J'ai passé quelques heures au travail aujourd'hui sans succès, je pense avoir un malentendu sur les jointures ou le regroupement de plusieurs colonnes.Groupe MySQL par colonnes multiples sur les tables jointes (WordPress)

J'ai inclus un vidage SQL à la fin de ce post afin que vous puissiez voir la base de données par vous-même - il va probablement expliquer mieux que mon poste est sur le point de!

Fondamentalement, c'est un blog WordPress qui a besoin des trois 'derniers messages' retirés de la base de données. La complication est seulement un poste de chaque catégorie - de sorte que vous ne pouvez pas sortir trois derniers messages et les avoir tous dans la même catégorie.

Je pensais que ce serait un simple 'group by' sur le post id, et l'identifiant de catégorie (term_id), suivi d'un LIMIT 3?

Dans cet exemple, je vais essayer de sortir 5 derniers articles de catégories uniques.

Donc, il y a quatre tables:

  • wp_posts, qui contient les messages de blog. Je veux seulement retourner post_type de 'publication' de cette table. Wp_terms
  • , ceci définit les 'mots clés'.
  • wp_term_taxonomy, une table qui définit ce qu'est chaque mot-clé - par exemple, est-ce une catégorie. Wp_term_relationships, qui lie les mots clés dans wp_terms aux messages.

Vous verrez les tableaux et les données de démonstration ci-dessous. Rapidement cependant, ce que je pensais - clairement de manière incorrecte - serait une requête comme celle-ci:

SELECT * FROM wp_posts 
INNER JOIN wp_term_relationships ON wp_term_relationships.object_id = wp_posts.id 
INNER JOIN wp_term_taxonomy ON wp_term_taxonomy.term_taxonomy_id = wp_term_relationships.term_taxonomy_id 
INNER JOIN wp_terms ON wp_terms.term_id = wp_term_taxonomy.term_id 
WHERE wp_term_taxonomy.taxonomy = 'category' 
AND wp_posts.post_type = 'post' 
GROUP BY wp_term_taxonomy.term_id wp_posts.id, 
ORDER BY post_date DESC 
LIMIT 5

Avec les données suivantes dans les tableaux, je me attends à la requête ci-dessus pour retourner la formation chiot, salle de bains Makeover, Post Nachos et boutons de couture. Les deux derniers seraient ignorés car il s'agit d'ID de message en double ou d'ID de terme. Mais à la place, je reçois ces quatre suivis de Changer les fusibles.

Quelle est la bonne façon d'interroger les données que je veux?

tableau wp_posts

+----+-------------------+---------------------+-----------+ 
| id | post_title  | post_date   | post_type | 
+----+-------------------+---------------------+-----------+ 
| 5 | Boiling Eggs  | 2009-06-11 22:57:07 | post  | 
| 6 | Boiling Eggs  | 2009-06-11 22:57:05 | revision | 
| 2 | About    | 2009-06-11 22:55:37 | page  | 
| 7 | Changing Fuses | 2009-06-11 22:57:19 | post  | 
| 8 | Changing Fuses | 2009-06-11 22:57:15 | revision | 
| 9 | Sewing Buttons | 2009-06-11 22:57:28 | post  | 
| 10 | Sewing Buttons | 2009-06-11 22:57:25 | revision | 
| 11 | Posh Nachos  | 2009-06-11 22:57:35 | post  | 
| 12 | Posh Nachos  | 2009-06-11 22:57:34 | revision | 
| 13 | Bathroom Makeover | 2009-06-11 22:57:44 | post  | 
| 14 | Bathroom Makeover | 2009-06-11 22:57:41 | revision | 
| 15 | Training Puppy | 2009-06-11 22:57:51 | post  | 
| 16 | Training Puppy | 2009-06-11 22:57:48 | revision | 
| 17 | Boiling Eggs  | 2009-06-11 22:57:07 | revision | 
| 18 | Training Puppy | 2009-06-11 22:57:51 | revision | 
| 19 | Bathroom Makeover | 2009-06-11 22:57:44 | revision | 
| 20 | Posh Nachos  | 2009-06-11 22:57:35 | revision | 
+----+-------------------+---------------------+-----------+

tableau wp_terms

+---------+---------------+---------------+------------+ 
| term_id | name   | slug   | term_group | 
+---------+---------------+---------------+------------+ 
|  1 | Uncategorized | uncategorized |   0 | 
|  2 | Blogroll  | blogroll  |   0 | 
|  3 | Food   | foot   |   0 | 
|  4 | DIY   | diy   |   0 | 
|  5 | Crafts  | crafts  |   0 | 
|  6 | Pets   | pets   |   0 | 
|  7 | puppy   | puppy   |   0 | 
|  8 | dog   | dog   |   0 | 
|  9 | training  | training  |   0 | 
|  10 | bathroom  | bathroom  |   0 | 
|  11 | rennovate  | rennovate  |   0 | 
|  12 | mexican  | mexican  |   0 | 
|  13 | snack   | snack   |   0 | 
|  14 | fast food  | fast-food  |   0 | 
+---------+---------------+---------------+------------+

tableau wp_term_taxonomy

+------------------+---------+---------------+-------------+--------+-------+ 
| term_taxonomy_id | term_id | taxonomy  | description | parent | count | 
+------------------+---------+---------------+-------------+--------+-------+ 
|    1 |  1 | category  |    |  0 |  0 | 
|    2 |  2 | link_category |    |  0 |  7 | 
|    3 |  3 | category  |    |  0 |  2 | 
|    4 |  4 | category  |    |  0 |  2 | 
|    5 |  5 | category  |    |  0 |  1 | 
|    6 |  6 | category  |    |  0 |  1 | 
|    8 |  7 | post_tag  |    |  0 |  1 | 
|    9 |  8 | post_tag  |    |  0 |  1 | 
|    10 |  9 | post_tag  |    |  0 |  1 | 
|    11 |  10 | post_tag  |    |  0 |  1 | 
|    12 |  11 | post_tag  |    |  0 |  1 | 
|    13 |  12 | post_tag  |    |  0 |  1 | 
|    14 |  13 | post_tag  |    |  0 |  1 | 
|    15 |  14 | post_tag  |    |  0 |  1 | 
+------------------+---------+---------------+-------------+--------+-------+

tableau wp_term_relationships

+-----------+------------------+------------+ 
| object_id | term_taxonomy_id | term_order | 
+-----------+------------------+------------+ 
|   1 |    2 |   0 | 
|   2 |    2 |   0 | 
|   3 |    2 |   0 | 
|   4 |    2 |   0 | 
|   5 |    2 |   0 | 
|   6 |    2 |   0 | 
|   7 |    2 |   0 | 
|   6 |    1 |   0 | 
|  18 |    1 |   0 | 
|   8 |    1 |   0 | 
|   7 |    4 |   0 | 
|  10 |    1 |   0 | 
|   9 |    5 |   0 | 
|  12 |    1 |   0 | 
|  11 |    3 |   0 | 
|  14 |    1 |   0 | 
|  13 |    4 |   0 | 
|  16 |    1 |   0 | 
|  15 |    6 |   0 | 
|  17 |    1 |   0 | 
|   5 |    3 |   0 | 
|  15 |    8 |   0 | 
|  15 |    9 |   0 | 
|  15 |    10 |   0 | 
|  19 |    1 |   0 | 
|  13 |    11 |   0 | 
|  13 |    12 |   0 | 
|  20 |    1 |   0 | 
|  11 |    13 |   0 | 
|  11 |    14 |   0 | 
|  11 |    15 |   0 | 
+-----------+------------------+------------+

SQL Dump

CREATE TABLE IF NOT EXISTS `wp_posts` (
    `ID` bigint(20) unsigned NOT NULL auto_increment, 
    `post_author` bigint(20) unsigned NOT NULL default '0', 
    `post_date` datetime NOT NULL default '0000-00-00 00:00:00', 
    `post_date_gmt` datetime NOT NULL default '0000-00-00 00:00:00', 
    `post_content` longtext NOT NULL, 
    `post_title` text NOT NULL, 
    `post_excerpt` text NOT NULL, 
    `post_status` varchar(20) NOT NULL default 'publish', 
    `comment_status` varchar(20) NOT NULL default 'open', 
    `ping_status` varchar(20) NOT NULL default 'open', 
    `post_password` varchar(20) NOT NULL default '', 
    `post_name` varchar(200) NOT NULL default '', 
    `to_ping` text NOT NULL, 
    `pinged` text NOT NULL, 
    `post_modified` datetime NOT NULL default '0000-00-00 00:00:00', 
    `post_modified_gmt` datetime NOT NULL default '0000-00-00 00:00:00', 
    `post_content_filtered` text NOT NULL, 
    `post_parent` bigint(20) unsigned NOT NULL default '0', 
    `guid` varchar(255) NOT NULL default '', 
    `menu_order` int(11) NOT NULL default '0', 
    `post_type` varchar(20) NOT NULL default 'post', 
    `post_mime_type` varchar(100) NOT NULL default '', 
    `comment_count` bigint(20) NOT NULL default '0', 
    PRIMARY KEY (`ID`), 
    KEY `post_name` (`post_name`), 
    KEY `type_status_date` (`post_type`,`post_status`,`post_date`,`ID`), 
    KEY `post_parent` (`post_parent`) 
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=21 ; 

-- 
-- Dumping data for table `wp_posts` 
-- 

INSERT INTO `wp_posts` (`ID`, `post_author`, `post_date`, `post_date_gmt`, `post_content`, `post_title`, `post_excerpt`, `post_status`, `comment_status`, `ping_status`, `post_password`, `post_name`, `to_ping`, `pinged`, `post_modified`, `post_modified_gmt`, `post_content_filtered`, `post_parent`, `guid`, `menu_order`, `post_type`, `post_mime_type`, `comment_count`) VALUES 
(5, 1, '2009-06-11 22:57:07', '2009-06-11 21:57:07', 'fadgagadf', 'Boiling Eggs', '', 'publish', 'open', 'open', '', 'boiling-eggs', '', '', '2009-06-11 22:58:03', '2009-06-11 21:58:03', '', 0, 'http://project1.searbe.co.uk/?p=5', 0, 'post', '', 0), 
(6, 1, '2009-06-11 22:57:05', '2009-06-11 21:57:05', '', 'Boiling Eggs', '', 'inherit', 'open', 'open', '', '5-revision', '', '', '2009-06-11 22:57:05', '2009-06-11 21:57:05', '', 5, 'http://project1.searbe.co.uk/?p=6', 0, 'revision', '', 0), 
(2, 1, '2009-06-11 22:55:37', '2009-06-11 21:55:37', 'This is an example of a WordPress page, you could edit this to put information about yourself or your site so readers know where you are coming from. You can create as many pages like this one or sub-pages as you like and manage all of your content inside of WordPress.', 'About', '', 'publish', 'open', 'open', '', 'about', '', '', '2009-06-11 22:55:37', '2009-06-11 21:55:37', '', 0, 'http://project1.searbe.co.uk/?page_id=2', 0, 'page', '', 0), 
(7, 1, '2009-06-11 22:57:19', '2009-06-11 21:57:19', 'fgsgfafga', 'Changing Fuses', '', 'publish', 'open', 'open', '', 'changing-fuses', '', '', '2009-06-11 22:57:19', '2009-06-11 21:57:19', '', 0, 'http://project1.searbe.co.uk/?p=7', 0, 'post', '', 0), 
(8, 1, '2009-06-11 22:57:15', '2009-06-11 21:57:15', '', 'Changing Fuses', '', 'inherit', 'open', 'open', '', '7-revision', '', '', '2009-06-11 22:57:15', '2009-06-11 21:57:15', '', 7, 'http://project1.searbe.co.uk/?p=8', 0, 'revision', '', 0), 
(9, 1, '2009-06-11 22:57:28', '2009-06-11 21:57:28', 'ghsghgs', 'Sewing Buttons', '', 'publish', 'open', 'open', '', 'sewing-buttons', '', '', '2009-06-11 22:57:28', '2009-06-11 21:57:28', '', 0, 'http://project1.searbe.co.uk/?p=9', 0, 'post', '', 0), 
(10, 1, '2009-06-11 22:57:25', '2009-06-11 21:57:25', '', 'Sewing Buttons', '', 'inherit', 'open', 'open', '', '9-revision', '', '', '2009-06-11 22:57:25', '2009-06-11 21:57:25', '', 9, 'http://project1.searbe.co.uk/?p=10', 0, 'revision', '', 0), 
(11, 1, '2009-06-11 22:57:35', '2009-06-11 21:57:35', 'hhjhdh', 'Posh Nachos', '', 'publish', 'open', 'open', '', 'posh-nachos', '', '', '2009-06-11 22:59:34', '2009-06-11 21:59:34', '', 0, 'http://project1.searbe.co.uk/?p=11', 0, 'post', '', 0), 
(12, 1, '2009-06-11 22:57:34', '2009-06-11 21:57:34', '', 'Posh Nachos', '', 'inherit', 'open', 'open', '', '11-revision', '', '', '2009-06-11 22:57:34', '2009-06-11 21:57:34', '', 11, 'http://project1.searbe.co.uk/?p=12', 0, 'revision', '', 0), 
(13, 1, '2009-06-11 22:57:44', '2009-06-11 21:57:44', 'hjhjdhjdjdh', 'Bathroom Makeover', '', 'publish', 'open', 'open', '', 'bathroom-makeover', '', '', '2009-06-11 22:59:19', '2009-06-11 21:59:19', '', 0, 'http://project1.searbe.co.uk/?p=13', 0, 'post', '', 0), 
(14, 1, '2009-06-11 22:57:41', '2009-06-11 21:57:41', '', 'Bathroom Makeover', '', 'inherit', 'open', 'open', '', '13-revision', '', '', '2009-06-11 22:57:41', '2009-06-11 21:57:41', '', 13, 'http://project1.searbe.co.uk/?p=14', 0, 'revision', '', 0), 
(15, 1, '2009-06-11 22:57:51', '2009-06-11 21:57:51', 'hjhjdjdy', 'Training Puppy', '', 'publish', 'open', 'open', '', 'training-puppy', '', '', '2009-06-11 22:59:05', '2009-06-11 21:59:05', '', 0, 'http://project1.searbe.co.uk/?p=15', 0, 'post', '', 0), 
(16, 1, '2009-06-11 22:57:48', '2009-06-11 21:57:48', '', 'Training Puppy', '', 'inherit', 'open', 'open', '', '15-revision', '', '', '2009-06-11 22:57:48', '2009-06-11 21:57:48', '', 15, 'http://project1.searbe.co.uk/?p=16', 0, 'revision', '', 0), 
(17, 1, '2009-06-11 22:57:07', '2009-06-11 21:57:07', 'fadgagadf', 'Boiling Eggs', '', 'inherit', 'open', 'open', '', '5-revision-2', '', '', '2009-06-11 22:57:07', '2009-06-11 21:57:07', '', 5, 'http://project1.searbe.co.uk/?p=17', 0, 'revision', '', 0), 
(18, 1, '2009-06-11 22:57:51', '2009-06-11 21:57:51', 'hjhjdjdy', 'Training Puppy', '', 'inherit', 'open', 'open', '', '15-revision-2', '', '', '2009-06-11 22:57:51', '2009-06-11 21:57:51', '', 15, 'http://project1.searbe.co.uk/?p=18', 0, 'revision', '', 0), 
(19, 1, '2009-06-11 22:57:44', '2009-06-11 21:57:44', 'hjhjdhjdjdh', 'Bathroom Makeover', '', 'inherit', 'open', 'open', '', '13-revision-2', '', '', '2009-06-11 22:57:44', '2009-06-11 21:57:44', '', 13, 'http://project1.searbe.co.uk/?p=19', 0, 'revision', '', 0), 
(20, 1, '2009-06-11 22:57:35', '2009-06-11 21:57:35', 'hhjhdh', 'Posh Nachos', '', 'inherit', 'open', 'open', '', '11-revision-2', '', '', '2009-06-11 22:57:35', '2009-06-11 21:57:35', '', 11, 'http://project1.searbe.co.uk/?p=20', 0, 'revision', '', 0); 

-- -------------------------------------------------------- 

-- 
-- Table structure for table `wp_terms` 
-- 

CREATE TABLE IF NOT EXISTS `wp_terms` (
    `term_id` bigint(20) unsigned NOT NULL auto_increment, 
    `name` varchar(200) NOT NULL default '', 
    `slug` varchar(200) NOT NULL default '', 
    `term_group` bigint(10) NOT NULL default '0', 
    PRIMARY KEY (`term_id`), 
    UNIQUE KEY `slug` (`slug`), 
    KEY `name` (`name`) 
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=15 ; 

-- 
-- Dumping data for table `wp_terms` 
-- 

INSERT INTO `wp_terms` (`term_id`, `name`, `slug`, `term_group`) VALUES 
(1, 'Uncategorized', 'uncategorized', 0), 
(2, 'Blogroll', 'blogroll', 0), 
(3, 'Food', 'foot', 0), 
(4, 'DIY', 'diy', 0), 
(5, 'Crafts', 'crafts', 0), 
(6, 'Pets', 'pets', 0), 
(7, 'puppy', 'puppy', 0), 
(8, 'dog', 'dog', 0), 
(9, 'training', 'training', 0), 
(10, 'bathroom', 'bathroom', 0), 
(11, 'rennovate', 'rennovate', 0), 
(12, 'mexican', 'mexican', 0), 
(13, 'snack', 'snack', 0), 
(14, 'fast food', 'fast-food', 0); 

-- -------------------------------------------------------- 

-- 
-- Table structure for table `wp_term_relationships` 
-- 

CREATE TABLE IF NOT EXISTS `wp_term_relationships` (
    `object_id` bigint(20) unsigned NOT NULL default '0', 
    `term_taxonomy_id` bigint(20) unsigned NOT NULL default '0', 
    `term_order` int(11) NOT NULL default '0', 
    PRIMARY KEY (`object_id`,`term_taxonomy_id`), 
    KEY `term_taxonomy_id` (`term_taxonomy_id`) 
) ENGINE=MyISAM DEFAULT CHARSET=utf8; 

-- 
-- Dumping data for table `wp_term_relationships` 
-- 

INSERT INTO `wp_term_relationships` (`object_id`, `term_taxonomy_id`, `term_order`) VALUES 
(1, 2, 0), 
(2, 2, 0), 
(3, 2, 0), 
(4, 2, 0), 
(5, 2, 0), 
(6, 2, 0), 
(7, 2, 0), 
(6, 1, 0), 
(18, 1, 0), 
(8, 1, 0), 
(7, 4, 0), 
(10, 1, 0), 
(9, 5, 0), 
(12, 1, 0), 
(11, 3, 0), 
(14, 1, 0), 
(13, 4, 0), 
(16, 1, 0), 
(15, 6, 0), 
(17, 1, 0), 
(5, 3, 0), 
(15, 8, 0), 
(15, 9, 0), 
(15, 10, 0), 
(19, 1, 0), 
(13, 11, 0), 
(13, 12, 0), 
(20, 1, 0), 
(11, 13, 0), 
(11, 14, 0), 
(11, 15, 0); 

-- -------------------------------------------------------- 

-- 
-- Table structure for table `wp_term_taxonomy` 
-- 

CREATE TABLE IF NOT EXISTS `wp_term_taxonomy` (
    `term_taxonomy_id` bigint(20) unsigned NOT NULL auto_increment, 
    `term_id` bigint(20) unsigned NOT NULL default '0', 
    `taxonomy` varchar(32) NOT NULL default '', 
    `description` longtext NOT NULL, 
    `parent` bigint(20) unsigned NOT NULL default '0', 
    `count` bigint(20) NOT NULL default '0', 
    PRIMARY KEY (`term_taxonomy_id`), 
    UNIQUE KEY `term_id_taxonomy` (`term_id`,`taxonomy`), 
    KEY `taxonomy` (`taxonomy`) 
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=16 ; 

-- 
-- Dumping data for table `wp_term_taxonomy` 
-- 

INSERT INTO `wp_term_taxonomy` (`term_taxonomy_id`, `term_id`, `taxonomy`, `description`, `parent`, `count`) VALUES 
(1, 1, 'category', '', 0, 0), 
(2, 2, 'link_category', '', 0, 7), 
(3, 3, 'category', '', 0, 2), 
(4, 4, 'category', '', 0, 2), 
(5, 5, 'category', '', 0, 1), 
(6, 6, 'category', '', 0, 1), 
(8, 7, 'post_tag', '', 0, 1), 
(9, 8, 'post_tag', '', 0, 1), 
(10, 9, 'post_tag', '', 0, 1), 
(11, 10, 'post_tag', '', 0, 1), 
(12, 11, 'post_tag', '', 0, 1), 
(13, 12, 'post_tag', '', 0, 1), 
(14, 13, 'post_tag', '', 0, 1), 
(15, 14, 'post_tag', '', 0, 1);

Source

2009-06-11 Anonymous

Répondre

3

mise à jour: Je me excuse pour flubbing ma compréhension de votre question initiale.Je l'ai parcouru et je me suis dit que c'était un autre exemple de la question du «top N de chaque groupe» que je vois si souvent.

Voici une solution à votre question initiale, qui est les plus récentes cinq postes, avec au plus un poste de chaque catégorie:

SELECT t.name, p1.post_title, p1.post_date 
FROM wp_term_taxonomy x 
INNER JOIN wp_terms t ON (t.term_id = x.term_id) 
INNER JOIN wp_term_relationships r1 ON (x.term_taxonomy_id = r1.term_taxonomy_id) 
INNER JOIN wp_posts p1 ON (r1.object_id = p1.id AND p1.post_type = 'post') 
LEFT OUTER JOIN (wp_term_relationships r2 
    INNER JOIN wp_posts p2 ON (r2.object_id = p2.id AND p2.post_type = 'post')) 
    ON (x.term_taxonomy_id = r2.term_taxonomy_id AND p1.post_date < p2.post_date) 
WHERE x.taxonomy = 'category' 
    AND r2.term_taxonomy_id IS NULL 
GROUP BY x.term_id 
ORDER BY p1.post_date DESC 
LIMIT 5;

est ici la sortie de mon test:

+--------+-------------------+---------------------+ 
| name | post_title  | post_date   | 
+--------+-------------------+---------------------+ 
| Pets | Training Puppy | 2009-06-11 22:57:51 | 
| DIY | Bathroom Makeover | 2009-06-11 22:57:44 | 
| Food | Posh Nachos  | 2009-06-11 22:57:35 | 
| Crafts | Sewing Buttons | 2009-06-11 22:57:28 | 
+--------+-------------------+---------------------+

PS: Merci beaucoup d'avoir posté les instructions DDL et INSERT dans votre question originale! Peu de gens qui posent des questions SQL le font.

Ci-dessous est ma première réponse, basée sur ma mauvaise compréhension de la question:

Donc, vous voulez tous les messages tels qu'il ya moins de cinq autres messages avec le même terme de catégorie et un plus récent post_date?

Vous devez joindre à la table postsdeux fois:

SELECT x.*, t.*, r1.*, p1.* 
FROM wp_term_taxonomy x 
INNER JOIN wp_terms t ON (t.term_id = x.term_id) 
INNER JOIN wp_term_relationships r1 ON (r1.term_taxonomy_id = x.term_taxonomy_id) 
INNER JOIN wp_posts p1 ON (p1.id = r1.object_id) 
INNER JOIN wp_term_relationships r2 ON (r2.term_taxonomy_id = x.term_taxonomy_id) 
INNER JOIN wp_posts p2 ON (p2.id = r2.object_id AND p2.post_date > p1.post_date) 
WHERE x.taxonomy = 'category' 
AND p1.post_type = 'post' AND p2.post_type = 'post' 
GROUP BY x.term_id, p1.id 
HAVING COUNT(*) < 5;

Source

2009-06-11 22:53:02

+0

Salut Bill - grand honneur de vous répondre ma question! Je vais essayer - mais d'après votre explication, je pense que ma description du problème n'était pas bonne (je devrais probablement poser ces questions avant minuit). Ce que je veux, c'est simplement les cinq derniers messages, mais aucun d'entre eux ne peut avoir le même terme de catégorie. Si je comprends bien, votre requête renvoie tous les "derniers" messages, avec un maximum de cinq messages de chaque catégorie? –

+0

Oui, ce dernier est ce que ma requête ci-dessus fait. Je n'ai pas compris votre problème d'origine. Je vais essayer de modifier ma réponse avec une requête qui résout ce problème. Stand by ... –

+0

Okay J'ai posté une nouvelle solution ci-dessus. J'ai aussi laissé ma réponse originale (fausse), au cas où cela aiderait quelqu'un d'autre dans le futur. : -} –

0

Cela est beaucoup version plus simple, mais grâce à votre facture d'idée:

SELECT wt.name, wp.post_title, wp.post_date 
FROM wp_term_relationships AS wtr 
INNER JOIN wp_posts AS wp ON (wtr.object_id = wp.id) 
INNER JOIN wp_term_taxonomy AS wtt ON (wtr.term_taxonomy_id = wtt.term_taxonomy_id) 
INNER JOIN wp_terms AS wt ON (wtt.term_id = wt.term_id) 
WHERE wp.post_type = 'post' 
and wtt.taxonomy = 'category' 
group by wtt.term_id 
order by wp.post_date desc;

Source

2012-01-20 03:01:17 Alfie

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