MongoDB Creating a Database

Syntax

The syntax for creating a database in MongoDB is as follows:

use DATABASE_NAME

If the database does not exist, it will be created; otherwise, it will switch to the specified database.

Example

The following example demonstrates creating a database named tutorialpro:

> use tutorialpro
switched to db tutorialpro
> db
tutorialpro
>

To view all databases, you can use the show dbs command:

> show dbs
admin   0.000GB
config  0.000GB
local   0.000GB
>

As you can see, the newly created database tutorialpro is not listed among the databases. To display it, we need to insert some data into the tutorialpro database.

> db.tutorialpro.insert({"name":"tutorialpro.org"})
WriteResult({ "nInserted" : 1 })
> show dbs
admin   0.000GB
config  0.000GB
local   0.000GB
tutorialpro  0.000GB

The default database in MongoDB is test. If you do not create a new database, collections will be stored in the test database.

Note: In MongoDB, a collection is only created after inserting content! This means that after creating a collection (table), you need to insert a document (record) for the collection to be actually created.