uid uname01 user1 02 user203 user3uid orderid order_price01 01 8001 02 9002 03 8202 04 95
实现对两个数据表进行join操作，显示效果为每个用户的所有订单信息
"01:user1" "01:80,02:90""02:user2" "03:82,04:95"
from mrjob
