INSERT INTO schedule (schdl_id
,schdl_dt
,schdl_unit
,book_id
,std_id
) VALUES (#{scheduleId}
,now()
,#{scheduleUnit}
,#{bookId}
,#{stdId}
);
UPDATE schedule
SET schdl_unit = #{scheduleUnit}
, book_id = #{bookId}
WHERE schdl_id = #{scheduleId}
DELETE FROM schedule
WHERE schdl_id = #{scheduleId}