1.简介

APACHE HIVE TM
The Apache Hive ™ data warehouse software facilitates reading, writing, and managing large datasets residing in distributed storage using SQL. Structure can be projected onto data already in storage. A command line tool and JDBC driver are provided to connect users to Hive.
数据仓库软件，支持使用SQL读取、写入和管理分布存储中的大型数据集。结构可以映射到存储中的数据。提供了一个命令行工具和JDBC驱动程序来将用户连接到Hive。

2.linux安装

tar -zvxf apache-hive-2.3.6-bin.tar.gz

export HIVE_HOME=/home/fcc/opt/hive/apache-hive-2.3.6-bin

就是个工具，不存在集群
bin/.hive 进入hive客户端

2.1hive的元数据库用mysql方式

2.1.1在服务器上安装mysql

2.1.3hive-site.xml

cp hive-default.xml.template hive-site.xml

<property>
	<name>javax.jdo.option.ConnectionURL</name>
	<value>jdbc:mysql://hadoop0:3306/hive?createDatabaseIfNotExist=true&amp;useSSL=false</value>
</property>
<property>
	<name>javax.jdo.option.ConnectionDriverName</name>
	<value>com.mysql.jdbc.Driver</value>
</property>
<property>
	<name>javax.jdo.option.ConnectionUserName</name>
	<value>root</value>
</property>
<property>
	<name>javax.jdo.option.ConnectionPassword</name>
	<value>root</value>
</property>

2.2启动hive

bin/hive


Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient

不能实例化一个类，lib/下没mysql的驱动包
Consider using a different execution engine (i.e. spark, tez) or using Hive 1.X releases.

建议换版本

2.3HQL

要将数据库的编码格式改为 latin1
mysql> alter database hive character set latin1;

创建表

create table t_order(id int,name string, rongliang string,price double)
    > row format delimited
    > fields terminated by '\t'
    > ;

插入数据

load data local inpath '/home/fcc/Desktop/hivetestdata/xxx.data' into table t_order;