hive学习1：hive1.2.1版本安装

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Hive只在一个节点上安装即可1.上传tar包2.解压tar -zxvf hive-1.2.1.tar.gz -C /usr/localmv  hive-1.2.1 hive
3.安装mysql数据库（切换到root用户）（装在哪里没有限制，只有能联通hadoop集群的节点）mysql安装仅供参考，不同版本mysql有各自的安装流程rpm -qa | grep mysqlrpm -e mysql-libs-5.1.66-2.el6_3.i686 --nodepsrpm -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mysqlmysql -u root -p4.配置hive（a）配置HIVE_HOME环境变量  vi conf/hive-env.sh 配置其中的$hadoop_home（b）配置元数据库信息   vi  hive-site.xml 添加如下内容：
<configuration>
<property>
<name>javax.jdo.option.ConnectionURL</name>
<value>jdbc:mysql://192.168.31.11:3306/hive?createDatabaseIfNotExist=true</value>
<description>JDBC connect string for a JDBC metastore</description>
</property><property>
<name>javax.jdo.option.ConnectionDriverName</name>
<value>com.mysql.jdbc.Driver</value>
<description>Driver class name for a JDBC metastore</description>
</property><property>
<name>javax.jdo.option.ConnectionUserName</name>
<value>root</value>
<description>username to use against metastore database</description>
</property><property>
<name>javax.jdo.option.ConnectionPassword</name>
<value>123456</value>
<description>password to use against metastore database</description>
</property>
</configuration>5.安装hive和mysq完成后，将mysql的连接jar包拷贝到$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 'root' WITH GRANT OPTION;FLUSH PRIVILEGES;6. Jline包版本不一致的问题，需要拷贝hive的lib目录中jline.2.12.jar的jar包替换掉hadoop中的 
/home/hadoop/app/hadoop-2.6.4/share/hadoop/yarn/lib/jline-0.9.94.jar启动hive
bin/hive//如果后面不想进入hive/bin下启动hive可以设置到环境变量里
修改环境变量/etc/profile：
vim /etc/profile
在文件末尾添加以下内容#hiveexport HIVE_HOME=/usr/local/hiveexport PATH=$PATH:$HIVE_HOME/bin执行立即生效
source /etc/profile
----------------------------------------------------------------------------------------------------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);

用beelinee 连接hive服务：

jdbc:hive2://localhost:10000 连接命令。

beeline> !connect jdbc:hive2://localhost:10000     //连接hive服务命令
Connecting to jdbc:hive2://localhost:10000            
Enter username for jdbc:hive2://localhost:10000: hadoop   //默认是机器的当前登录用户名
Enter password for jdbc:hive2://localhost:10000:           //默认为空
Connected to: Apache Hive (version 1.2.1)

启动成功后，可以在别的节点上用beeline去连接