select c.course_id as courseId , c.course_details_id as courseDetailsId , c.course_details_name as courseDetailsName , c.video_url as videoUrl , c.price as countPrice , c.sort as sort , ifnull(#{price}, 0) as price , ifnull(#{wholesalePrice}, 0) as wholesalePrice , IF(#{isPrice} = 1, c.is_price, 2) AS isPrice , c.title_img as titleImg , c.good_num as goodNum , c.sort as sort from course_details c where c.course_id = #{courseId} order by c.sort asc select c.*, ifnull(cc.isGood,0) as isGood from course_details c left join (select course_details_id,count(*) isGood from course_collect where user_id=#{userId} and classify=2 group by course_details_id) cc on c.course_details_id = c.course_details_id where c.course_id=#{id} order by c.sort asc select * from course_details where course_id=#{id} and good=#{good} and (good=#{good} or good is null) order by sort asc select c.course_details_id as courseDetailsId, c.course_id as courseId, c.wx_course_details_id as wxCourseDetailsId, c.course_details_name as courseDetailsName, c.create_time as createTime, c.title_img as titleImg, c.content, c.good_num as goodNum, c.price, if(c.is_price!=1,c.video_url,'') as videoUrl, c.dy_episode_id as dyEpisodeId, c.advertising, c.view_count as viewCount, c.play_complete_count as playCompleteCount, ifnull(cc.isGood,0) as isGood from course_details c left join (select course_details_id,count(*) as isGood from course_collect where user_id=#{userId} and classify=2 group by course_details_id) cc on cc.course_details_id = c.course_details_id where c.course_id=#{id} order by c.sort asc DELETE FROM course_details WHERE course_details_id IN #{ids} select count(1) from course_details where course_id = #{courseId} select ifnull(sum(view_count),0) as viewCounts, ifnull(sum(good_num),0) as goodNum, ifnull(count(*),0) as courseDetailsCount from course_details where course_id = #{courseId} SELECT course_id as courseId, COUNT(*) AS courseDetailsCount FROM course_details where course_details_id GROUP BY course_id