MongoDB is a scalable database management system that stores data as documents in a collection, rather than as rows in a table, such as you’d find in a relational database system. A document is an object made up of one or more field and value pairs that contain related data. A field’s value can be one of a variety of data types, including arrays or embedded documents. Support for such data types eliminates the need to create the type of complex joins used in relational database.
MongoDB is a NoSQL database system. The acronym NoSQL, which means “not only SQL,”