|SELECT '${stat_date}' as stat_date,sum(a.time_duration)/count(a.device_id) as duration_everytime_avge from (select device_id,params['duration'] as time_duration
|SELECT '${stat_date}' as stat_date,sum(a.time_duration)/count(a.device_id) as duration_everytime_avge from (select device_id,params['duration'] as time_duration