Datatypes in MongoDB
It is known that the MongoDB stores the JSON data in a binary encoded format called BSON, where JSON data model actually extends the BSON in order to provide more flexibility with the additional data types and helps in easily encoding and decoding the data across various programming languages. By default, there is no support for the datatypes like date in JSON. But, BSON provides that feature.
MongoDB supports the below list of datatypes. Each datatype in MongoDB possess a unique number.
| Datatype | Number | Description |
|---|
| Double | 1 | Used to stored floating point values |
| String | 2 | Commonly used datatype and it is UTF-8 valid |
| Object | 3 | Used for storing embedded objects |
| Array | 4 | Used for storing embedded objects |
| Binary Data | 5 | Used to store binary data |
| Undefined | 6 | Used to store undefined value |
| Object Id | 7 | Used to store document's ID |
| Boolean | 9 | Used to store Boolean value |
| Date | 10 | Used to store current date time in UNIX format. |
| Null | 11 | Used to store null value |
| Regular Expression | 12 | Used to store regex |
| Javascript | 13 | Used to store JavaScript data without scope |
| Symbol | 14 | Basically used to store string, but reserved for languages that use specific symbol |
| Javascript with scope | 15 | Used to store JavaScript data with scope |
| Integer | 16 & 18 | Used to store numerical value |
| Timestamp | 10 | Used to track when a document is modified. |
| Min/Max Key | 255/127 | Used to compare value against lowest and highest BSON elements |
