MongoDB is a document-oriented NoSQL database used for a large amount of data storage. It was created by Eliot and Dwight in 2007. Classified as a NoSQL database program, MongoDB uses JSON-like documents with schemas.MongoDB is a document database. Each database contains collections which in turn contains documents. Each document can be different with varying number of fields. The size and content of each document can be different from each other.
MongoDB stores data as documents in a binary representation called binary JSON.The BSON encoding extends the popular JSON representation to include additional types such as int, long, date, and floating point. Documents that tend to share a similar structure areorganized as collections.
Some of the common terms in MongoDB are
The _id field is like the document's primary key. The _id field represents a unique value in the MongoDB document.
A collection is the equivalent of a table which is created in any other RDMS such as Oracle or MS SQL. A collection exists within a single database.
It is a pointer to the result set of a query. Clients can iterate through a cursor to retrieve results.
Each database gets its own set of files on the file system. A MongoDB server can store multiple databases.
A record in a MongoDB collection is basically called a document. The document consists of field name and values.
A document has zero or more fields. Fields are analogous to columns in relational databases.It is a name value pair in a document.
The features which make the MongoDB popular are
5.Ad hoc Queries support
7.Large media storage
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