JOIN查询特定类别

Question

检索过去后我对WordPress的下面的代码：

SELECT terms.*, posts.ID as post_ID 
FROM wp_terms terms 
JOIN wp_term_taxonomy term_taxonomy 
    ON terms.term_id = term_taxonomy.term_id 
JOIN wp_term_relationships term_relationships 
    ON (term_relationships.term_taxonomy_id = term_taxonomy.term_taxonomy_id 
     AND term_taxonomy.taxonomy = 'category') 
JOIN wp_posts posts 
    ON (posts.ID = term_relationships.object_id 
     AND posts.post_type='post' 
     AND posts.post_status='publish') 
WHERE terms.term_id=19 OR terms.term_id=20 OR terms.term_id=21 OR terms.term_id=22 
GROUP BY terms.term_id 
ORDER BY posts.post_modified_gmt DESC 

我要检索特定类别的最后一个职位。但它返回每个类别的第一篇文章。我究竟做错了什么？

Answer 1

尝试删除DESC关键字。