MongoDB Create Databases and Collections

MongoDB Create Databases and Collections- MongoDB stores data in a Database → Collection → Document structure.

Database → Like a container for collections (similar to a database in SQL).

Collection → Like a table in SQL, it contains multiple documents.

Document → A JSON-like object that stores actual data.

Create a Database

use database_name

If myDatabase doesn’t exist, it will create a new database.

For checking the current database:

db

To show all databases:

show dbs

Create a Collection

db.createCollection("collection_name") // syntax

db.createCollection("students")

This will create an empty collection named students.

To view collections in the current DB:

show collections

Delete a Collection

The drop() method is used to delete an entire collection from a database in MongoDB.

Once a collection is dropped, all documents inside it are permanently deleted and cannot be recovered.

db.collection_name.drop()

db → Refers to the current database.

collection_name → Name of the collection you want to delete.

drop() → Removes the collection.

Drop a collection of students

db.students.drop()

Output will be:

true

Drop the Entire Database

db.dropDatabase()

This will delete the whole database, including all collections.