user_course_id, user_id, course_id, course_percent, class_id, status_id select a.course_percent, a.course_id, b.course_name, b.course_logo, c.course_type, b.course_teacher, b.course_hours, a.user_id, a.class_id from (SELECT * FROM user_course WHERE user_id = #{userId,jdbcType=INTEGER} and class_id = #{classId,jdbcType=INTEGER}) as a left join course b on a.course_id = b.course_id left join (select * from class_course c where class_id = #{classId,jdbcType=INTEGER}) as c on a.course_id = c.course_id order by c.course_type select count(*) from user_status k join `user` m on k.user_id=m.user_id where k.status=1 and k.class_id=#{classId} and m.user_mobile=#{phone} select a.*, b.course_name, b.course_logo from (SELECT * FROM user_course WHERE user_id = #{userId,jdbcType=INTEGER} and class_id = #{classId,jdbcType=INTEGER} and course_id = #{courseId,jdbcType=INTEGER}) as a left join course b on a.course_id = b.course_id SELECT FROM user_course WHERE user_id = #{userId} AND class_id = #{classId} SELECT FROM user_course WHERE user_id = #{userId} AND class_id = #{classId} AND course_id = #{courseId}