MongoDB is a scalable, high-performance, open source NoSQL database.
It offers Ad hoc queries, Indexing, Replication, Load balancing, File storage (GridFS), Aggregation,
Each database can have many Collections (Can say "tables" in RDBMS language).
The following example shows how to export a Collection using mongoexport utility.
mongoexport -d mytestdb -c students
mongoexport -d mytestdb -c students -f name,age
mongoexport -d mytestdb -c students -f name,age --csv
-d [ --db ] arg The database to use
-c [ --collection ] arg The Collection to export
-f [ --fields ] arg Comma separated list of fields to export
--csv Exports the contents of Collection as CSV instead of JSON.