INSERT INTO class_group id_, music_group_id_, subject_id_list_, name_, student_num_, create_time_, update_time_, type_, VALUES #{id}, #{musicGroupId}, #{subjectIdList}, #{name}, #{studentNum}, #{createTime}, #{updateTime}, #{type,typeHandler=com.ym.mec.common.dal.CustomEnumTypeHandler}, UPDATE class_group SET WHERE id_ = #{id} SELECT * FROM class_group ORDER BY id_ UPDATE class_group subject_id_list_ = #{subjectIdList}, student_num_ = #{studentNum}, update_time_ = #{updateTime}, music_group_id_ = #{musicGroupId}, type_ = #{type,typeHandler=com.ym.mec.common.dal.CustomEnumTypeHandler}, name_ = #{name}, WHERE id_ = #{id} DELETE FROM class_group WHERE id_ = #{id} SELECT * FROM class_group ORDER BY id_ SELECT COUNT(*) FROM class_group SELECT c.*, m.* FROM class_group c, music_group m WHERE c.main_teacher_id_ = #{teacherId} OR c.assistant_teacher_id_ = #{teacherId} SELECT * FROM class_group cg WHERE cg.type_="MIX" AND cg.music_group_id_=#{musicGroupId} AND del_flag_='0' SELECT cg.* FROM class_group_relation cgr LEFT JOIN class_group cg ON cgr.class_group_id_=cg.id_ WHERE cgr.sub_class_group_id_=#{mixClassGroupId} AND del_flag_='0' SELECT cg.*, (SELECT group_concat(sb.name_) FROM subject sb WHERE FIND_IN_SET(sb.id_,cg.subject_id_list_)) AS subject_name FROM class_group cg WHERE cg.music_group_id_=#{musicGroupId} AND cg.type_=#{type} AND cg.del_flag_='0'