How to drop a database in MongoDB?

To drop a database in MongoDB, you need to use dropDatabase() method. The syntax is as follows:

db.dropDatabase()

The above syntax will delete the present working database. If you haven’t selected any database then it will delete the default database.

Before deleting the database, first list all the databases with the help of show command. The query is as follows:

> show dbs;

The following is the output:

admin 0.000GB
config 0.000GB
local 0.000GB
sample 0.000GB

Here, let us delete the database ‘sample’. To delete the database ‘sample’, you need to switch the database with the help of use command. The syntax is as follows:

use yourDatabaseName;

The query is as follows:

> use sample;
switched to db sample

Now you can delete the database ‘sample’. To delete the database, you need to use the dropDatabase() method as we discussed above.

The query is as follows:

> db.dropDatabase();

The following is the output:

{ "dropped" : "sample", "ok" : 1 }

Now to check whether the database ‘sample’ is deleted or not, you need to use the show command. The query is as follows:

> show dbs;

The following is the output:

admin 0.000GB
config 0.000GB
local 0.000GB

Look at the above sample output, there is no ‘sample’ database i.e. we deleted the database successfully.

Nancy Den

Published on 18-Mar-2019 10:24:58