大数据从入门到实战——Hive基本查询操作（一）

第1关 where操作

----------禁止修改----------
create database if not exists db1;
use db1;

create table if not exists table1(
eduLevel_name string comment '学历',
company_name string comment '公司名',
jobName string comment '职位名称',
salary int comment '薪资',
city_code int comment '城市编码',
responsibility string comment '岗位职责',
workingExp string comment '工作经验'
)
row format delimited fields terminated by ','
lines terminated by '\n'
stored as textfile;
truncate table table1;
load data local inpath '/root/aaa.txt' into table table1;
----------禁止修改----------

----------Begin----------
select workingExp,company_name from table1 where responsibility like '%hive%' and salary > 8000
----------End----------

第2关 group by操作

----------禁止修改----------
create database if not exists db1;
use db1;


create table if not exists table1(
eduLevel_name string comment '学历',
company_name string comment '公司名',
jobName string comment '职位名称',
salary int comment '薪资',
city_code int comment '城市编码',
responsibility string comment '岗位职责',
workingExp string comment '工作经验'
)
row format delimited fields terminated by ','
lines terminated by '\n'
stored as textfile;
truncate table table1;
load data local inpath '/root/t1.txt' into table table1;
----------禁止修改----------

----------Begin----------
select avg(salary) as avgsalary,workingExp from table1 group by workingExp having avgsalary > 10000
----------End----------

第3关 join操作

----------禁止修改----------
create database if not exists db1;
use db1;

create table if not exists table1(
eduLevel_name string comment '学历',
company_name string comment '公司名',
jobName string comment '职位名称',
salary int comment '薪资',
city_code int comment '城市编码',
responsibility string comment '岗位职责',
workingExp string comment '工作经验'
)
row format delimited fields terminated by ','
lines terminated by '\n'
stored as textfile;
truncate table table1;
load data local inpath '/root/t2.txt' into table table1;

create table if not exists table2(
city_code int comment '城市编码',
city_name string comment '城市名'
)
row format delimited fields terminated by ','
lines terminated by '\n'
stored as textfile;
truncate table table2;
load data local inpath '/root/t22.txt' into table table2;
----------禁止修改----------

----------Begin----------
select avg(table1.salary),table2.city_name from table1 right outer  join table2 on table1.city_code=table2.city_code group by table2.city_name;
----------End----------