stat_id, app_type, entrance_id, c2s_pkt_num, s2c_pkt_num, c2s_byte_len, s2c_byte_len, stat_time SELECT app_type appType, SUM(link_num) count, (SUM(c2s_pkt_num)+SUM(s2c_pkt_num)) pktNum,(SUM(c2s_byte_len)+SUM(s2c_byte_len)) byteLen FROM galaxy.traffic_app_statistic WHERE app_type !=0 and stat_time = (SELECT MAX(stat_time) FROM galaxy.traffic_app_statistic WHERE app_type != 0) GROUP BY app_type order by count desc limit 0,10