Php 如何按常用标记的数量列出相关的博客文章？

我想显示一个相关博客文章的列表，并希望该列表按照它们对当前文章的常用标记的数量排序。每个帖子可以有多个关联的标签。以下是我的表格结构：

[张贴][标签]

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我正在使用PHP和MySQL-我可以在一个查询中完成这项工作吗？

确保您可以在一个查询中完成这项工作：

SELECT postid, count(tagid) as common_tag_count
FROM posts_to_tags
WHERE tagid IN (SELECT tagid FROM posts_to_tags WHERE postid = 2)
GROUP BY postid ORDER BY common_tag_count DESC; 

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确定您可以在一个查询中完成此操作：

SELECT postid, count(tagid) as common_tag_count
FROM posts_to_tags
WHERE tagid IN (SELECT tagid FROM posts_to_tags WHERE postid = 2)
GROUP BY postid ORDER BY common_tag_count DESC; 

那……呢

SELECT COUNT(*) AS numcommon, posts.pid, posts.post FROM posts
               INNER JOIN p2t ON p2t.pid = posts.pid
               WHERE p2t.tid IN
               (SELECT p2t.tid FROM p2t
               INNER JOIN posts ON p2t.pid = posts.pid
               WHERE posts.pid = 1)
               AND posts.pid != 1
               GROUP BY posts.pid
               ORDER BY numcommon

假设pid是posts表中的主键，tid是tags表中的主键，p2t（post to tag）表中的两个外键？

那么

SELECT COUNT(*) AS numcommon, posts.pid, posts.post FROM posts
               INNER JOIN p2t ON p2t.pid = posts.pid
               WHERE p2t.tid IN
               (SELECT p2t.tid FROM p2t
               INNER JOIN posts ON p2t.pid = posts.pid
               WHERE posts.pid = 1)
               AND posts.pid != 1
               GROUP BY posts.pid
               ORDER BY numcommon

假设pid是posts表中的主键，tid是tags表中的主键，p2t（post to tag）表中的两个外键