14.Sqoop把数据从HDFS导出到mysql

创建数据文件

,gopal,manager,,TP
,manisha,preader,,TP
,kalil,php dev,,AC
,prasanth,php dev,,AC
,kranthi,admin,,TP
,satish p,grp des,,GR

把数据文件上传到集群

在HDFS上创建目录

hadoop fs -mkdir -p /user/hadoop/emp

把数据文件上传到HDFS上

hadoop fs -put emp_data.txt /user/hadoop/emp

登录Mysql

mysql> create database userdb;
Query OK,  row affected (0.00 sec)
 
mysql> grant all privileges on userdb.* to 'sqoop'@'%' identified by 'sqoop';
Query OK,  rows affected (0.15 sec)
 
mysql> grant all privileges on userdb.* to 'sqoop'@'localhost' identified by 'sqoop';
Query OK,  rows affected (0.00 sec)
 
mysql> grant all privileges on userdb.* to 'sqoop'@'node1' identified by 'sqoop';
Query OK,  rows affected (0.00 sec)
 
mysql> flush privileges;
Query OK,  rows affected (0.01 sec)
 
mysql> use userdb
Database changed
mysql> 

在mysql里创建一个表

 CREATE TABLE employee (
   id INT NOT NULL PRIMARY KEY,
   name VARCHAR(),
   deg VARCHAR(),
   salary INT,
   dept VARCHAR());

现在需要从HDFS上把数据导入到mysql中对应的表

执行命令

bin/sqoop export \
--connect jdbc:mysql://node1:3306/userdb \
--username sqoop \
--password sqoop \
--table employee \
--export-dir /user/hadoop/emp/
--input-fields-terminated-by ','

查看Mysql表的数据