In MongoDB, data is stored in a binary format called BSON (Binary JSON), which is a superset of JSON (JavaScript Object Notation). While both BSON and JSON are used to represent data in MongoDB, they have some key differences.
BSON is a binary-encoded serialization of JSON-like documents. It is designed to be efficient in storage, traversability, and encoding/decoding. Some of its key features include:
Date
, Binary
, ObjectId
, and Decimal128
. This makes it possible to represent diverse data more accurately in MongoDB documents.JSON is a lightweight and human-readable data representation format that can be easily parsed and generated by many programming languages. It is used widely as a medium for transmitting data over the web. Some features of JSON include:
null
. This means that some data, like dates or binary data, must be represented as strings or custom objects in JSON.While BSON and JSON are related, they serve different purposes in the context of MongoDB:
By using BSON internally, MongoDB can take advantage of its benefits in storage, traversability, and a richer data type representation while still providing the interoperability and readability of JSON through query interfaces and drivers.