Python MongoDB - Create Database

Quiz

Unlike other databases, MongoDB does not provide separate command to create a database.

In general, the use command is used to select/switch to the specific database. This command initially verifies whether the database we specify exists, if so, it connects to it. If the database, we specify with the use command doesnt exist a new database will be created.

Therefore, you can create a database in MongoDB using the Use command.

Syntax

Basic syntax of use DATABASE statement is as follows −

use DATABASE_NAME

Example

Following command creates a database named in mydb.

>use mydb
switched to db mydb

You can verify your creation by using the db command, this displays the current database.

>db
mydb

Example - Creating database using python

To connect to MongoDB using pymongo, you need to import and create a MongoClient, then you can directly access the database you need to create in attribute passion.

Following example creates a database in MangoDB.

main.py

from pymongo import MongoClient

#Creating a pymongo client
client = MongoClient('localhost', 27017)

#Getting the database instance
db = client['mydb']
print("Database created........")

#Verification
print("List of databases after creating new one")
print(client.list_database_names())

Output

Database created........
List of databases after creating new one
['admin', 'config', 'local', 'myDb', 'mydata', 'newdata', 'sampleDB', 'test']

You can also specify the port and host names while creating a MongoClient and can access the databases in dictionary style.

Example - Using Port

main.py

from pymongo import MongoClient

#Creating a pymongo client
client = MongoClient('localhost', 27017)

#Getting the database instance
db = client['mydb']
print("Database created........")

Output

Database created........

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