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This document assumes you are using a Linux or Linux-like environment.
After manipulating the imported records (for example, with Map Reduce or Hive) you may have a result data set which you can then back to the relational database.The output of this import process is a set of files containing a copy of the imported table or datasets. For this reason, the output will be in multiple files.These files may be delimited text files (for example, with commas or tabs separating each field), or binary Avro or Sequence Files containing serialized record data.The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.You may obtain a copy of the License at Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
You can use Sqoop to import data from a relational database management system (RDBMS) such as My SQL or Oracle or a mainframe into the Hadoop Distributed File System (HDFS), transform the data in Hadoop Map Reduce, and then export the data back into an RDBMS.