Python Tutorials · Python MongoDB

MongoDB Create DB

Learn all about MongoDB Create DB in this comprehensive tutorial.

5 min read advanced

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

Creating a Database

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.

python

import pymongomyclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["mydatabase"]

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

MongoDB waits until you have created a collection (table), with at least one document (record) before it actually creates the database (and collection).

Check if Database Exists

Note: Remember: In MongoDB, a database is not created until it gets content, so if this is your first time creating a database, you should complete the next two chapters (create collection and create document) before you check if the database exists!

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

python

print(myclient.list_database_names())

Or you can check a specific database by name:

python

dblist = myclient.list_database_names()if "mydatabase" in dblist:  
  print("The database exists.")

Module quiz

2 questions

Which of the following is true about MongoDB Create DB?

It is strictly typedIt is evaluated at runtimeIt requires explicit memory managementIt is deprecated

What is the most common pitfall when working with MongoDB Create DB?

SyntaxErrorIndentationErrorNameErrorTypeError

Answer all questions to submit.

MongoDB Get Started

MongoDB Collection

MongoDB Create DB

AI Summary

Creating a Database

Check if Database Exists

Module quiz