How to clear a MongoDB database?

To clear, use dropDatabase. Following is the syntax −

use yourDatabaseName; db.dropDatabase();

To clear a MongoDB database, first show all the databases −

> show dbs

This will produce the following output −

MyDB    0.000GB admin    0.000GB config    0.000GB local    0.000GB onlinecustomertracker 0.000GB test    0.006GB

Now, let us delete the database onlinecustomertracker −

> use onlinecustomertracker switched to db onlinecustomertracker > db.dropDatabase(); { "dropped" : "onlinecustomertracker", "ok" : 1 }

Following is the query to show all databases after deleting a database above −

> show dbs

This will produce the following output −

MyDB    0.000GB admin    0.000GB config    0.000GB local    0.000GB test    0.006GB