MongoDB - Create Database

In this chapter, we will see how to create a database in MongoDB.

The use Command

The use DATABASE_NAME command in MongoDB is used to create a database. The command will create a new database if it doesn't exist; otherwise, it will return the existing database.

Syntax

The basic syntax of the use DATABASE statement is as follows:

use DATABASE_NAME

Example

If you want to use a database named mydb, the use DATABASE statement would be as follows:

> use mydb
switched to db mydb

To check your currently selected database, use the command db:

> db
mydb

If you want to check your databases list, use the command show dbs:

> show dbs
local     0.78125GB
test      0.23012GB

Your created database (mydb) is not present in the list. To display the database, you need to insert at least one document into it:

> db.movie.insert({"name":"tutorials point"})
> show dbs
local      0.78125GB
mydb       0.23012GB
test       0.23012GB

In MongoDB, the default database is test. If you didn't create any database, then collections will be stored in the test database.

Data Modeling Diagram

Command Summary

Command	Description
use DATABASE_NAME	Create or switch to a database
db	Check the currently selected database
show dbs	List all databases
db.<collection>.insert(document)	Insert a document into a collection