MongoDB stores data in JSON-like documents, which makes the database very flexible and scalable. NoSQL database is MongoDB.

PyMongo Python needs a MongoDB driver to access the MongoDB database.

we will use the MongoDB driver "PyMongo".

We recommend that you use PIP to install "PyMongo".

To test if the installation was successful, or if you already have "pymongo" installed, create a Python page with the following content:

To create a database in MongoDB, start by creating a MongoClient object, then specify a connection URL with the correct ip address and the name of the database you want to create.

MongoDB will create the database if it does not exist, and make a connection to it.

Important: In MongoDB, a database is not created until it gets content!

Important: In MongoDB, a collection is not created until it gets content!

MongoDB waits until you have inserted a document before it actually creates the collection.

import pymongo

myclient = pymongo.MongoClient("mongodb://localhost:27017/")

mydb = myclient["mydatabase"]

You can check if a database exist by listing all databases in you system:

print(myclient.list_database_names())

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To create a collection in MongoDB, use database object and specify the name of the collection you want to create.

MongoDB will create the collection if it does not exist.

import pymongo

myclient = pymongo.MongoClient("mongodb://localhost:27017/")

mydb = myclient["mydatabase"]

mycol = mydb["customers"]

Return a list of all collections in your database:

Insert Into Collection To insert a record, or document as it is called in MongoDB, into a collection,

we use the insert_one() method.

The first parameter of the insert_one() method is a dictionary containing the name(s) and value(s) of each field in the document you want to insert.

To insert multiple documents into a collection in MongoDB,

we use the insert_many() method.

The first parameter of the insert_many() method is a list containing dictionaries with the data you want to insert:

In MongoDB we use the find and findOne methods to find data in a collection.

Just like the SELECT statement is used to find data in a table in a MySQL database. To select data from a collection in MongoDB,

we can use the find_one() method.

The find_one() method returns the first occurrence in the selection.

The find() method returns all occurrences in the selection.