Step1: $mysql -uroot -pcloudera
Step 2: show Databases;
Step 3: Use retail_db;
Step4: Show Tables;
Step 5: Choose Table departments
 select * From departments;
 Step 6: Open New Terminal and Write import command.
Step 7: import command from mysql to HDFS
 $ sqoop import --connect jdbc:mysql://localhost:3306/retail_db --username root -- 
password cloudera --table departments;
This will take sometime to process

Step 8: To check file imported in HDFS use below command 
 $ hadoop fs -ls /user/cloudera;
Step 9: To check the content of the file 
 $ hadoop fs -cat /user/cloudera/departments/part*
 
 step10: Create New Table in Mysql (Terminal 1)
Create Table departments_hdfs(deptid INT, deptName Varchar(20));
This will create new table in mysql 
Verify: show Tables;
step 11: Open New Terminal and Write export command.
Step 12. Export Command HDFS TO Mysql.
$ sqoop export --connect jdbc:mysql://localhost:3306/retail_db --username root --
password cloudera --table departments_hdfs --export-dir 
/user/cloudera/departments/part*

Step 13. In First cmd 
Select * From departments_hdfs;