Hive查看出租率

·出租率 = 总间夜数/总房间数

·根据出租率计算表 hive_tb_1 中的酒店出租率，并根据出租率降序，将前八条写入表 hive_tb_2中。

insert overwrite table default.hive_tb_2  
select * from (
	select city,wineshop,cast((sum(room_night)/sum(room)) as decimal(10,4)) as lease from default.hive_tb_1 group by city,wineshop
) order by lease desc limit 8;