Hivesql 一维表转为二维表

一个表里的两个字端，一个机型，一个周，要展示成每周的top10 机型，用一个SQL实现

 原始数据显示：

jx	周	销量
iphone	ww1	11
iphone	ww1	22
iphone	ww2	34
huawei	ww1	21
huawei	ww1	1
huawei	ww2	33

然后我们需要做些处理，展示成如下 

select jx,sum(case  when week=202136 then cnt else 0 end) as ww1,
sum(case  when week=202135 then cnt else 0 end) as ww2
from (
select week,jx,cnt,row_number() over(partition by week order by cnt desc )  as row 
from (select week,jx,sum(cnt) as cnt from table_test group by 1,2)
where week = 202136 or week =202135
having row <20 
)
group by 1 order by ww1 desc 

jx	ww1	ww2
iphone	23	34
huawei	22	33

so esay