delete from t_yw_point
update t_yw_point
point_name = #{point.pointName},
unit_id = #{point.unitId},
start_time = #{point.startTime},
end_time = #{point.endTime},
province_tag = #{point.provinceTag},
important_command_image_tag = #{point.importantCommandImageTag},
WHERE serial_number = #{point.serialNumber}