Data type of MongoDB

Data type of MongoDB

Object ID: ID of the document

String: Strings, most commonly used, must be utf-8

Boolean: Boolean value, True or False

Integer: Integers

Double: Floating-point number

Arrays: Array or list, multiple values stored to a key

Object: Used to embed a document, i.e. a value of one document

NULL: Store null value

Timestamp: Time stamp

Date: Stores the current date or time in Unix time format

Object ID:

Each document has a property that guarantees the uniqueness of the document for _id;

You can set _id to insert the document yourself.

If you do not set it, MongoDB provides a unique _id for each document, which is a 12-byte hexadecimal number

The first 4 bytes are the current timestamp

The next 3 bytes are machine ID

The next 2 bytes for the service process ID of MONGO

The last 3 is a simple increment value

Data type of MongoDB