status_id, user_id, class_id, order_id, `status` SELECT status_id, class_config_id, class_name, need_paper, (bx_hours + xx_hours) as total_hours, apply_start_time, apply_end_time, study_start_time, study_end_time, paper_start_time, paper_end_time, cert_start_time, cert_end_time, user_id, paper_id, status FROM user_status as ut INNER JOIN class_config cc on ut.class_id = cc.class_config_id WHERE user_id = #{userId} SELECT FROM user_status WHERE user_id = #{userId} SELECT FROM user_status WHERE class_id = #{classId} AND user_id = #{userId} SELECT u.* FROM user u INNER JOIN user_status us on u.user_id = us.user_id WHERE us.class_id = #{classId}