14.Sqoop把数据从HDFS导出到mysql

创建数据文件

1201,gopal,manager,50000,TP
1202,manisha,preader,50000,TP
1203,kalil,php dev,30000,AC
1204,prasanth,php dev,30000,AC
1205,kranthi,admin,20000,TP
1206,satish p,grp des,20000,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, 1 row affected (0.00 sec)

mysql> grant all privileges on userdb.* to 'sqoop'@'%' identified by 'sqoop';
Query OK, 0 rows affected (0.15 sec)

mysql> grant all privileges on userdb.* to 'sqoop'@'localhost' identified by 'sqoop';
Query OK, 0 rows affected (0.00 sec)

mysql> grant all privileges on userdb.* to 'sqoop'@'node1' identified by 'sqoop';
Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;
Query OK, 0 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(20), 
   deg VARCHAR(20),
   salary INT,
   dept VARCHAR(10));

 

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