hive教程：select查询语句-准备数据（dept、emp） 作者：马育民 • 2021-03-15 09:01 • 阅读：10252 # 介绍 dept表、emp表是oracle数据库的内置表，用于演示 # 启动服务 登录 `hadoop1`，执行下面命令： ``` cd /program/bin ``` ### 启动 hadoop ``` ./hadoop.sh start ``` ### 启动hive ``` ./hive.sh start ``` # 准备数据文件 在 linux 执行下面命令 ### dept 表数据 ``` vim /program/dept.txt ``` 内容如下： ``` 10, ACCOUNTING, NEW YORK 20, RESEARCH, DALLAS 30, SALES, CHICAGO 40, OPERATIONS, BOSTON ``` ### emp 表数据 ``` vim /program/emp.txt ``` 内容如下： ``` 7369,SMITH,CLERK,7902,1980-12-17,800,,20 7499,ALLEN,SALESMAN,7698,1981-02-20,1600,300,30 7521,WARD,SALESMAN,7698,1981-02-22,1250,500,30 7566,JONES,MANAGER,7839,1981-04-02,2975,,20 7654,MARTIN,SALESMAN,7698,1981-09-28,1250,1400,30 7698,BLAKE,MANAGER,7839,1981-05-01,2850,,30 7782,CLARK,MANAGER,7839,1981-06-09,2450,,10 7788,SCOTT,ANALYST,7566,1982-12-09,3000,,20 7839,KING,PRESIDENT,,1981-11-17,5000,,10 7844,TURNER,SALESMAN,7698,1981-09-08,1500,0,30 7876,ADAMS,CLERK,7788,1983-01-12,1100,,20 7900,JAMES,CLERK,7698,1981-12-03,950,,30 7902,FORD,ANALYST,7566,1981-12-03,3000,,20 7934,MILLER,CLERK,7782,1982-01-23,1300,,10 ``` # 创建表方式 ### hive 客户端 执行下面命令： ``` hive ``` ### dbeaver 略 # 创建表 dept 表 ``` create external table dept( deptno int comment '部门编号', dname string comment '部门名称', loc string comment '部门所在地' ) row format delimited fields terminated by ','; ``` ### 导入数据 ``` load data local inpath '/program/dept.txt' into table dept; ``` # 创建表 emp 表 ``` create external table emp( empno int comment '员工编号', ename string comment '姓名', job string comment '岗位', mgr int comment '领导编号', hiredate string comment '入职时间', sal double comment '工资', comm double comment '奖金', deptno int comment '部门编号' ) row format delimited fields terminated by ','; ``` ### 导入数据 ``` load data local inpath '/program/emp.txt' into table emp; ``` # 测试 执行查询语句： ``` select * from emp ``` ``` select * from dept ``` 原文出处：http://malaoshi.top/show_1IXlN51DbxF.html