sql的explode函數

在查詢數據時，當字段類型為array時候，無法直接查詢這個字段，需要用explode來打開

例如

 

 

 

 查詢clicks字段，需要用explode打開

select local_dt,s.name
from
(
    SELECT local_dt,
                explode(payload.clicks) as s
    from dts_obt.eventtypeclientclick 
    where dt BETWEEN '20200604' and '20200608'
    and local_dt between '20200605' and '20200607'
    and payload.region="BR"
) 

　　再例如

 

 

select 
       a.local_dt,
       sum(a.gems_delta)
from 
(select explode(del_items) as s,
       gems_delta,
       local_dt
from ff_facts.exchange_items_facts
where utc_8_dt between "20200115" and "20200119"
and   region = "TW") as a 
where a.gems_delta > 0
and   a.s.id = 400000128
group by a.local_dt
order by a.local_dt