Wordpress自定义SQL查询与多个postmeta左连接

Question

我需要编写一个查询返回数据基于如果广泛的不同元键包含特定的值。

我已经成功地编写了一个可以工作的查询 - 但我认为必须有更好的方法。我的查询完全是LEFT JOINS和OR语句。如果有人能改善我的查询，我会非常感谢！

继承人的野兽：

SELECT wp.post_type, nice_name, COUNT(wp.post_type) as counter 
FROM wp_posts wp 
LEFT JOIN wp_postmeta a ON (a.post_id = wp.ID AND a.meta_key = 'multiple_publication_issues_0_issue_number')        
LEFT JOIN wp_postmeta b ON (b.post_id = wp.ID AND b.meta_key = 'multiple_publication_issues_1_issue_number') 
LEFT JOIN wp_postmeta c ON (c.post_id = wp.ID AND c.meta_key = 'multiple_publication_issues_2_issue_number') 
LEFT JOIN wp_postmeta d ON (d.post_id = wp.ID AND d.meta_key = 'multiple_publication_issues_3_issue_number') 
LEFT JOIN wp_postmeta e ON (e.post_id = wp.ID AND e.meta_key = 'multiple_publication_issues_4_issue_number') 
LEFT JOIN wp_postmeta f ON (f.post_id = wp.ID AND f.meta_key = 'multiple_publication_issues_5_issue_number') 
LEFT JOIN wp_postmeta g ON (g.post_id = wp.ID AND g.meta_key = 'multiple_publication_issues_6_issue_number') 
LEFT JOIN wp_postmeta h ON (h.post_id = wp.ID AND h.meta_key = 'multiple_publication_issues_7_issue_number') 
LEFT JOIN wp_postmeta i ON (i.post_id = wp.ID AND i.meta_key = 'multiple_publication_issues_8_issue_number') 
LEFT JOIN wp_postmeta j ON (j.post_id = wp.ID AND j.meta_key = 'multiple_publication_issues_9_issue_number') 
LEFT JOIN wp_postmeta k ON (k.post_id = wp.ID AND k.meta_key = 'multiple_publication_issues_10_issue_number') 
LEFT JOIN wp_postmeta l ON (l.post_id = wp.ID AND l.meta_key = 'multiple_publication_issues_11_issue_number') 
LEFT JOIN wp_postmeta m ON (m.post_id = wp.ID AND m.meta_key = 'multiple_publication_issues_12_issue_number') 
LEFT JOIN wp_postmeta n ON (n.post_id = wp.ID AND n.meta_key = 'multiple_publication_issues_13_issue_number') 
LEFT JOIN wp_postmeta o ON (o.post_id = wp.ID AND o.meta_key = 'multiple_publication_issues_14_issue_number') 
LEFT JOIN wp_postmeta p ON (p.post_id = wp.ID AND p.meta_key = 'multiple_publication_issues_15_issue_number')               
INNER JOIN post_types ptt ON (wp.post_type = ptt.post_type) 
WHERE wp.post_status = 'publish'        
AND(a.meta_value = 119 
OR b.meta_value = '119' 
OR c.meta_value = '119' 
OR d.meta_value = '119' 
OR e.meta_value = '119' 
OR f.meta_value = '119' 
OR g.meta_value = '119' 
OR h.meta_value = '119' 
OR i.meta_value = '119' 
OR j.meta_value = '119' 
OR k.meta_value = '119' 
OR l.meta_value = '119' 
OR m.meta_value = '119' 
OR n.meta_value = '119' 
OR o.meta_value = '119' 
OR p.meta_value = '119') 

GROUP BY wp.post_type, nice_name 

Answer 1

我想你也许可以做到这一点：

SELECT 
    wp.post_type, 
    nice_name, 
    COUNT(wp.post_type) as counter 
FROM wp_posts wp 
INNER JOIN post_types ptt ON (wp.post_type = ptt.post_type) 
WHERE EXISTS 
(
    SELECT 
     NULL 
    FROM 
     wp_postmeta 
    WHERE 
     wp_postmeta.meta_key IN 
     (
      'multiple_publication_issues_1_issue_number', 
      'multiple_publication_issues_2_issue_number', 
      'multiple_publication_issues_3_issue_number', 
      'multiple_publication_issues_4_issue_number', 
      'multiple_publication_issues_5_issue_number', 
      'multiple_publication_issues_6_issue_number', 
      'multiple_publication_issues_7_issue_number', 
      'multiple_publication_issues_8_issue_number', 
      'multiple_publication_issues_9_issue_number', 
      'multiple_publication_issues_10_issue_number', 
      'multiple_publication_issues_11_issue_number', 
      'multiple_publication_issues_12_issue_number', 
      'multiple_publication_issues_13_issue_number', 
      'multiple_publication_issues_14_issue_number', 
      'multiple_publication_issues_15_issue_number', 
     ) 
     AND wp_postmeta.meta_value = '119' 
     AND wp.ID=wp_postmeta.post_id 
) 
AND wp.post_status = 'publish' 
GROUP BY 
    wp.post_type, 
    nice_name