insert into tb_dormitory_student( dormitory_id, bed_id, student_id, checkin, status )values( #{dormitoryId}, #{bedId}, #{studentId}, #{checkin}, #{status} ) delete from tb_dormitory_student where id = #{id} delete from tb_dormitory_student where student_id = #{studentId} update tb_dormitory_student set dormitory_id=#{dormitoryId}, bed_id=#{bedId}, student_id=#{studentId}, checkin=#{checkin}, status=#{status} where id = #{id} update tb_dormitory_student set dormitory_id = #{dormitoryId}, bed_id = #{bedId}, student_id = #{studentId}, checkin = #{checkin}, status = #{status} where id = #{id} and id = #{id} and dormitory_id = #{dormitoryId} and bed_id = #{bedId} and student_id = #{studentId} and status = #{status}