bst load part order by str emp mmd num ()

2014010216
2014010410
2012010609
2012010812
2012011023
2001010212
2001010411
2013010619
2013010812
2013011023
2008010216
2008010414
2007010619
2007010812
2007011023
2010010216
2010010410
2015010649
2015010812
2015011023

create table t_wendu_line(
line string
);
load data local inpath ‘/root/wendu.txt‘ into table t_wendu_line;
求每一年最大氣溫的那一天 + 溫度
臨時數據存放在視圖中
create view v_temperature_data
as
select substr(line,1,4) as year,

from_unixtime(unix_timestamp(substr(line,1,8),‘yyyymmdd‘),‘yyyy-mm-dd‘) tdate
,cast(substr(line,9,2) as smallint) as temperature_num
from t_wendu_line;

select year,tdate,temperature_num
from (
select year,tdate,temperature_num,
row_number() over(partition by year order by temperature_num desc ) as rn
,rank() over(partition by year order by temperature_num desc ) as rn1

,dense_rank() over(partition by year order by temperature_num desc ) as rn2
from v_temperature_data
) tmp
where tmp.rn = 1;

2001 2001-01-02 12
2007 2007-01-10 23
2008 2008-01-02 16
2010 2010-01-02 16
2012 2012-01-10 23
2013 2013-01-10 23
2014 2014-01-02 16
2015 2015-01-06 49

Hive求每一年最大氣溫的那一天 + 溫度