hive的安装

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）
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(mysql-connector-java-5.1.28.jar)
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);