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MongoDB

 MongoDB is a source-available cross-platform document-oriented database program. Classified as a NoSQL database program, MongoDB uses JSON-like documents with optional schemas. MongoDB is developed by MongoDB Inc. and licensed under the Server Side Public License (SSPL) which is deemed non-free by several distributions.



MongoDB supports field, range query, and regular-expression searches.

Fields in a MongoDB document can be indexed with primary and secondary indices or index.

MongoDB provides high availability with replica sets.

MongoDB scales horizontally using sharding.

MongoDB can be used as a file system, called GridFS, with load balancing and data replication features over multiple machines for storing files.

MongoDB provides three ways to perform aggregation: the aggregation pipeline, the map-reduce function, and single-purpose aggregation methods.

MongoDB supports fixed-size collections called capped collections. 

MongoDB claims to support multi-document ACID transactions since the 4.0 release in June 2018.


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