hive 抽样方法
Posted 江枫1
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select *
from (
select *
from advert.dws_advert_order_model_sample_pcvr_v2_di
where dt>= date_sub(‘${date}‘,7) and dt< ‘${date}‘
and ((label >=0.5 and rand()>(1-2*0.05)) or (label <0.5 and rand()>(1-2*0.05)))
union all
select *
from advert.dws_advert_order_model_sample_pcvr_v2_di
where dt=‘${date}‘
and ((label >=0.5 and rand()>(1-2*0.05)) or (label <0.5 and rand()>(1-2*0.05)))
) tmp
where rand()>0.3;
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