Hive 实验

// 创建数据库并导入数据

1. create database {database_name};

2. use {database_name};

3. create table docs(line string);

4. load data inpath '/training/{student_name}/inceptor_data/wordcount' into table docs;

//创建结果表

create table wc(word string, totalword int);

// wordcount统计

from (select explode(split(line, ' ')) as word from docs) w

insert into table wc

select word, count(1) as totalword

group by word

order by word;

// 查看分析结果

select * from wc;

// 创建外表

 create external table ext_table(rowkey string, num int, country int, rd string) row format delimited fields terminated by ',' location '/images/inceptor_data';

//创建ORC事务表

// 设置开启事务

1. set transaction.type=inceptor;

// 设置PLSQL编译器不检查语义

2. set plsql.compile.dml.check.semantic=fal