hive 创建表和导入数据实例

//创建数据库
create datebase hive;
//创建表
create table t_emp(
id int,
name string,
age int,
dept_name string,
like array<string>,
tedian map<string,string>
)
row format delimited
fields terminated by ','
collection items terminated by '_'
map keys terminated by ':';

ap: 1,zhangsan,32,xxx,sports_books_travel,sex:man_color:red

导入本地文件
load data local inpath '/root/emp.txt' into table t_emp;

导出表数据到hdfs
export table t_emp to '/home/xx_t_emp.txt';

启动hive服务
启动hive服务之前修改hive-site.xml中的thrift.bind.*为主机名。
./hive --service hiveserver2

java连接hive代码
public static void main(String[] args) throws Exception{
Class.forName("org.apache.hive.jdbc.HiveDriver");
Connection conn = DriverManager.getConnection("jdbc:hive2://192.168.56.101:10000/default","root","");
try {
Statement stat = conn.createStatement();
ResultSet result = stat.executeQuery("select count(*) from t_emp");
if(result.next()){
System.out.println(result.getInt(1));
}
} catch (Exception e) {
e.printStackTrace();
// TODO: handle exception
}finally {
conn.close();
}
}