php - MySQL 按另一个表的计数排序

Question

假设我有:

   SELECT bloggers.*, 
          COUNT(post_id) AS post_count
     FROM bloggers 
LEFT JOIN blogger_posts ON bloggers.blogger_id = blogger_posts.blogger_id
 GROUP BY bloggers.blogger_id
 ORDER BY post_count

这会返回所有按帖子数排序的博主。 如果我只想要一些博主，但仍按相同的标准排序(例如，那些 AUX 字段等于 3 的博主)怎么办？

Answer 1

WHERE 子句应紧接在 GROUP BY 子句之前。当对像语法这样简单的事情有疑问时，可以查看手册。

MySQL Manual :: SELECT Syntax

   SELECT bloggers.*, 
          COUNT(post_id) AS post_count
     FROM bloggers 
LEFT JOIN blogger_posts ON bloggers.blogger_id = blogger_posts.blogger_id
    WHERE bloggers.AUX = 3
 GROUP BY bloggers.blogger_id
 ORDER BY post_count