hive安装

Hive只在一个节点上安装即可


1.上传tar包


2.解压
tar -zxvf hive-0.9.0.tar.gz -C /cloud/
3.配置mysql metastore（切换到root用户）
配置HIVE_HOME环境变量
rpm -qa | grep mysql
rpm -e mysql-libs-5.1.66-2.el6_3.i686 --nodeps
rpm -ivh MySQL-server-5.1.73-1.glibc23.i386.rpm 
rpm -ivh MySQL-client-5.1.73-1.glibc23.i386.rpm 
修改mysql的密码
/usr/bin/mysql_secure_installation
（注意：删除匿名用户，允许用户远程连接）
登陆mysql
mysql -u root -p


4.配置hive
cp hive-default.xml.template hive-site.xml 
修改hive-site.xml（删除所有内容，只留一个<property></property>）
添加如下内容：
<property>
 <name>javax.jdo.option.ConnectionURL</name>
 <value>jdbc:mysql://weekend01:3306/hive?createDatabaseIfNotExist=true</value>
 <description>JDBC connect string for a JDBC metastore</description>
</property>


<property>
 <name>javax.jdo.option.ConnectionDriverName</name>
 <value>com.mysql.jdbc.Driver</value>
 <description>Driver class name for a JDBC metastore</description>
</property>


<property>
 <name>javax.jdo.option.ConnectionUserName</name>
 <value>root</value>
 <description>username to use against metastore database</description>
</property>


<property>
 <name>javax.jdo.option.ConnectionPassword</name>
 <value>root</value>
 <description>password to use against metastore database</description>
</property>

5.安装hive和mysq完成后，将mysql的连接jar包拷贝到$HIVE_HOME/lib目录下
如果出现没有权限的问题，在mysql授权(在安装mysql的机器上执行)
mysql -uroot -p

#(执行下面的语句  

*.*:所有库下的所有表   

%：任何IP地址或主机都可以连接)

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123' WITH GRANT OPTION;
FLUSH PRIVILEGES;

6.建表(默认是内部表)

create table trade_detail(id bigint, account string, income double, expenses double, time string) 

row format delimited

fields terminated by '\t';

建分区表

create table td_part(id bigint, account string, income double, expenses double, time string)

partitioned by (logdate string) 

row format delimited 

fields terminated by '\t';

建外部表

create external table td_ext(id bigint, account string, income double, expenses double, time string) 

row format delimited 

fields terminated by '\t' 

location '/td_ext';

7.创建分区表
普通表和分区表区别：有大量数据增加的需要建分区表

create table book (id bigint, name string) partitioned by (pubdate string) 

row format delimited 

fields terminated by '\t'; 

分区表加载数据
load data local inpath './book.txt' overwrite into table book partition (pubdate='2010-08-22');

load data local inpath '/root/data.am' into table beauty partition (nation="USA");

select nation, avg(size) from beauties group by nation order by avg(size);

create table page view(id int,name string,salary double)
partitioned by(part_flag string) //分区其中(part_flag 可以为表中的字段也可以不是
row format delimited  //一条记录为一行
fields terminated by '\t' //字段之间以'\t'分割开
stored as sequencefile; //存储格式（二进制格式）还有textfile格式 （默认文本）

select count(*) from t_order_pt where month=‘201401’//分区查看