按计数排序的多个联接将忽略条件

Question

I am trying to only get rows from video_index that belongs to a specific category from category_video_rel and order the result by COUNT of view count. This is the query I'm using:

  SELECT COUNT(DISTINCT view_count.id) AS count, view_count.remove, view_count.video_id, video_index.id AS video_id, video_index.active, video_index.remove, video_index.title AS title, video_index.date_published AS date_published, category_video_rel.active, category_video_rel.remove, category_video_rel.video_id AS cv_video_id, category_video_rel.category_id AS category_id FROM view_count JOIN video_index ON view_count.video_id = video_index.id, category_video_rel JOIN video_index AS v ON category_video_rel.video_id = v.id WHERE view_count.remove = '0' AND video_index.active = '1' AND video_index.remove = '0' AND video_index.date_published <= '$current_time' AND category_video_rel.category_id = '$category_id' AND category_video_rel.active = '1' AND category_video_rel.remove = '0' GROUP BY video_index.id ORDER BY count DESC 

The problem is it outputs all the rows from video_index with a view count higher than 0 regardless of the category. Basically, it's ignoring "category_video_rel.category_id = '$category_id'" in the WHERE condition.

I have no idea what I'm doing wrong, please help.

Answer 1

Your FROM clause is mixing old style joins and new style joins Instead try:

FROM 
    view_count JOIN video_index 
        ON view_count.video_id = video_index.id
    JOIN category_video_rel 
        ON category_video_rel.video_id = video_index.id