Sqoop is software for transferring data between relational databases and Hadoop. Sqoop became a top-level Apache project in March 2012. It can be used, for example, to populate tables from a relational or NoSQL database for use with Hive or HBase.
Microsoft uses a Sqoop-based connector to help transfer data from Microsoft SQL Server databases to Hadoop. Couchbase also provides a Couchbase-Hadoop connector by means of Sqoop.