Hive安装，

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://hadoop00:3306/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>123</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);