select a.id, a.name, a.course_id, a.status,a.company_id, a.sort,a.version, a.create_by, a.create_time, a.update_by, a.update_time, a.remark, b.id as period_id,a.id as chapter_id,b.name as period_name,b.resource_id from ex_course_chapter a left join ex_course_chapter_period b on b.chapter_id=a.id and a.course_id=#{courseId} AND a.name like concat('%', #{name}, '%') AND a.status =#{status} order by a.sort asc,a.id desc where a.id=#{chapterId} select id,name,course_id from ex_course_chapter where name=#{name} and course_id=#{courseId} limit 1 select * from ex_course_chapter where course_id=#{courseId} order by sort asc,id desc select count(1) from ex_course_chapter where course_id=#{courseId} select * from ex_course_chapter_period where chapter_id=#{chapterId} select count(1) from ex_course_chapter_period where chapter_id=#{chapterId}