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.
Official Website :- https://www.mongodb.com/