Create and Drop MongoDB Database

Create a database

The below command is used to create or access a MongoDB database.

sh
1use ;

Replace <code><database-name></code> with the name you want to keep to your database. We will use the <code>todo</code> database throughout this course.

The above <code>use</code> command does not create anything until you insert the first record. Here is an example of an insert command. In this example, we are inserting a <strong>task</strong> into the <code>tasks</code> collection.

sh
1db.tasks.insertOne({ name: "Learn Chapter 1", });

The below command verifies the database creation. It returns names and sizes of all the databases.

sh
1show databases; // OR you can use the "show dbs" command

You will see some databases other than <code>todo</code>. They are created by default by MongoDB on installation and are used for user management and system purpose.

Drop a database

Run the following commands in the terminal below to drop a database.

<ol>- Select the database that you want to drop. </ol> ```sh use ; ```

1. Drop the database

sh
1db.dropDatabase();

This command will remove all the collections and documents.

You may see the below error if you don’t have enough permission to drop a database.

MongoServerError: not authorized on todo to execute command { dropDatabase: 1, lsid: { id: UUID("1479ef4b-5e3f-42df-aaf8-93234469e6dc") }, $db: "todo" }