Sqoop is a tool designed to transfer data between Hadoop and various relational databases. You can use Sqoop to import data from a relational database management system (RDBMS) such as Netezza, MySQL, Oracle or SQL Server into the Hadoop Distributed File System (HDFS), transform the data and perform complex calculations in Hadoop MapReduce, and then export the data back into an RDBMS. Sqoop is based on a connector architecture which supports plugins to provide connectivity to external systems (RDBMS) .