Question

我正在运行WordPress，我想编写一个自定义查询，根据一个特定类别显示每月的帖子存档。我使用调试模式了解如何根据所有帖子获取每月存档，选择特定类别。以下是查询：

获取montlhy存档：

SELECT YEAR(post_date) AS `year`, MONTH (post_date) AS `month`, 
  count(ID) as posts FROM wp_posts  
  WHERE post_type = 'post' AND post_status = 'publish' 
  GROUP BY YEAR(post_date), MONTH(post_date) ORDER BY post_date DESC

选择类别：

SELECT t.*, tt.* FROM wp_terms AS t INNER JOIN wp_term_taxonomy
  AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy 
  IN ('category')  AND t.slug = 'blog' ORDER BY t.name ASC

我无法弄清楚如何加入这两个;）任何帮助表示赞赏！

感谢。

更新

还有另一个名为term_relationships的表，因此共有4个表。这是WordPress数据库结构的图像：http://codex.wordpress.org/images/8/83/WP_27_dbsERD.png

无论如何，这就是我所在的地方：

SELECT t.*, tt.*, YEAR(post_date) AS `year`, MONTH(post_date) AS `month`, 
    count(ID) as posts FROM wp_posts, wp_term_relationships AS tr, 
    wp_terms AS t INNER JOIN wp_term_taxonomy AS tt ON t.term_id = tt.term_id 
    WHERE tt.taxonomy IN ('category') AND t.slug = 'blog' 
    AND post_type = 'post' AND post_status = 'publish' 
    AND ID = tr.object_id AND tr.term_taxonomy_id = t.term_id 
    GROUP BY YEAR(post_date), MONTH(post_date) ORDER BY post_date DESC

我知道这不是最好的方式，这就是我需要你帮助的原因;）

感谢。

Answer 1

这样的事情如何作为连接的基础和你需要的where子句添加：

    SELECT 
        YEAR(post_date) AS `year`, 
        MONTH (post_date) AS `month`, 
        count(ID) as posts  
    FROM wp_posts 
    INNER JOIN wp_term_relationships wtr ON wp_posts.id = wtr.object_id
    INNER JOIN wp_term_taxonomy wtt ON wtr.term_taxonomy_id = wtt.term_taxonomy_id
    INNER JOIN wp_terms wt ON wtt.term_id = wt.term_id
    WHERE post_type = 'post' AND post_status = 'publish' 
    AND wtt.taxonomy = 'category'
    AND wt.name = 'enter category name here'
    GROUP BY YEAR(post_date), MONTH(post_date) ORDER BY post_date DESC

需要MySQL的帮助，加入两个查询

1 个答案: