通过sqoop将mysql数据导入到hive中进行计算示例

CREATE TABLE `account` (
  `id` int(11) PRIMARY KEY AUTO_INCREMENT,
  `account` varchar(20),
  `name` varchar(5),
  `age` int(3)
);
insert into account(account, name, age) values("tom@qq.com", "Tom", 23);
insert into account(account, name, age) values("jack@qq.com", "Jack", 20);
insert into account(account, name, age) values("jone@qq.com", "Jone", 22);
insert into account(account, name, age) values("jimi@qq.com", "Jimi", 25);
insert into account(account, name, age) values("black@qq.com", "Black", 24);
select * from account;
CREATE TABLE `detail` (
  `id` int(11) PRIMARY KEY AUTO_INCREMENT,
  `account` varchar(20),
  `income` double,
  `expenses` double,
  `time` varchar(10)
);
insert into detail(account, income, expenses, time) values("tom@qq.com", 10, 20, 2018-12-1);
insert into detail(account, income, expenses, time) values("jack@qq.com", 10, 30, 2018-12-4);
insert into detail(account, income, expenses, time) values("jone@qq.com", 13, 22, 2018-12-3);
insert into detail(account, income, expenses, time) values("jimi@qq.com", 45, 25, 2018-12-2);
insert into detail(account, income, expenses, time) values("black@qq.com", 34, 24, 2018-12-1);
insert into detail(account, income, expenses, time) values("tom@qq.com", 50, 20, 2018-12-1);
select * from detail;

create table account (
  id int, 
  account string, 
  name string, 
  age int
) row format delimited fields terminated by '\t';
create table detail (
  id int, 
  account string, 
  income double, 
  expenses double, 
  time string
) row format delimited fields terminated by '\t';

sqoop import 
--connect jdbc:mysql://localhost:3306/mydata 
--username root 
--password 123456 
--table account 
--hive-import 
--hive-overwrite 
--hive-table account 
--fields-terminated-by '\t'
sqoop import --connect jdbc:mysql://localhost:3306/mydata --username root --password 123456 --table detail --hive-import --hive-overwrite --hive-table detail --fields-terminated-by '\t'
1

select a.account, a.name, d.total 
from account as a 
join(
  select account, sum(income - expenses) as total 
  from detail group by account
) as d 
on a.account=d.account;

+--------------+-------+-------+
| account      | name  | total |
+--------------+-------+-------+
| black@qq.com | Black |    10 |
| jack@qq.com  | Jack  |   -20 |
| jimi@qq.com  | Jimi  |    20 |
| jone@qq.com  | Jone  |    -9 |
| tom@qq.com   | Tom   |    20 |
+--------------+-------+-------+

black@qq.com  Black 10.0
jack@qq.com Jack  -20.0
jimi@qq.com Jimi  20.0
jone@qq.com Jone  -9.0
tom@qq.com  Tom  20.0

/tmp/hive on HDFS should be writable.

> hadoop fs -chmod -R 777 /tmp

Could not load org.apache.hadoop.hive.conf.HiveConf. Make sure HIVE_CONF_DIR

export HADOOP_CLASSPATH=$HADOOP_CLASSPATH:$HIVE_HOME/lib/*