MongoDB is a non-relational database and the target database platform is relational - PostgreSQL. Is there a simple approach to migrating data from MongoDB to PostgreSQL? First problem - defining a target schema . Second problem - tweaking the target schema for any changes made by the developers on the MongoDB side aka Evolving Schema. As a one-off migration - probably not such a major problem - but if your basing a DIY ETL process on mongoexport - than it's something you'll need to consider There is a tool provided by MongoDB called mongoexport and it's capable of exporting csv... Read more →