insert into ems_metrics (station_id, cpu_ratio, memory_ratio, disk_ratio, day, create_time, sn) values (#{stationId},#{cpuRatio},#{memoryRatio},#{diskRatio},#{day},#{createTime},#{sn}) update ems_metrics set cpu_ratio=#{cpuRatio}, memory_ratio=#{memoryRatio}, disk_ratio=#{diskRatio}, create_time=#{createTime}, sn=#{sn} where station_id=#{stationId} and day=#{day} select id, station_id, cpu_ratio, memory_ratio, disk_ratio, day, create_time, sn from ems_metrics where station_id = #{stationId} and day = #{day} select id, station_id, cpu_ratio, memory_ratio, disk_ratio, day, create_time, sn from ems_metrics where station_id = #{id} order by day desc limit 1