【Hive】笔试题 05 （求月销售额和总销售额）

1、数据说明

（1）数据格式

a,01,150
a,01,200
b,01,1000
b,01,800
c,01,250
c,01,220
b,01,6000
a,02,2000
a,02,3000
b,02,1000
b,02,1500
c,02,350
c,02,280
a,03,350
a,03,250

（2）字段含义

店铺，月份，金额

2、数据准备

（1）创建数据库表t_store

use class;
create table t_store(
name string,
months int,
money int
) 
row format delimited fields terminated by ",";

（2）导入数据

load data local inpath "/home/hadoop/store.txt" into table t_store;

3、需求

编写Hive的HQL语句求出每个店铺的当月销售额和累计到当月的总销售额

4、解析

（1）按照商店名称和月份进行分组统计

create table tmp_store1 as 
select name,months,sum(money) as money from t_store group by name,months;

select * from tmp_store1;

（2）对tmp_store1 表里面的数据进行自连接

create table tmp_store2 as 
select a.name aname,a.months amonths,a.money amoney,b.name bname,b.months bmonths,b.money bmoney from tmp_store1 a 
join tmp_store1 b on a.name=b.name order by aname,amonths;

select * from tmp_store2;

（3）比较统计

select aname,amonths,amoney,sum(bmoney) as total from tmp_store2 where amonths >= bmonths group by aname,amonths,amoney;