Delete Database in MongoDB

DropDatabase () method in MongoDB

The db.dropDatabase () command in MongoDB is used to delete an existing database.

Syntax

The basic syntax of the dropDatabase () command is as follows:

 db . dropDatabase ()

This command will delete the selected database. If you do not select any database, it will delete the default test database.

For example

First, check the list of available databases using the show dbs command.

 > show dbs local 0.78125GB mydb 0.23012GB test 0.23012GB >

If you want to delete the new database mydb , then the dropDatabase () command will be as follows:

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

Now, try checking the list of databases.

 > show dbs local 0.78125GB test 0.23012GB >

According to Tutorialspoint

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David Pac

Update 25 May 2019

Create Collection in MongoDB
method db.createcollection (name, options) in mongodb is used to create collection.
Delete Collection in MongoDB
the db.collection.drop () method in mongodb is used to delete a collection from the database.
Data type in MongoDB
mongodb supports many different data types. the following are some typical data types.
Insert Document in MongoDB
to insert data into collection in mongodb, you need to use the insert () or save () method.
Query Document in MongoDB
to query data from collection in mongodb, you need to use the find () method in mongodb.
Update Document in MongoDB
the update () method updates the values in the existing document while the save () method replaces the existing document with the transmitted document in that save () method.