Short Note on CRUD Operations of MongoDB…

MongoDB CRUD Operations

CRUD operations create, read, update, and delete documents in MongoDB.

Create Operations
Create or insert operations add new documents to a collection in the database. If the collection does not currently exist in the database, then insert operations will create the collection.

MongoDB provides the following methods to insert documents into a collection:

• db.collection.insertOne()
• db.collection.insertMany() Here, insert operations target a single collection.

Read Operations
Read operations retrieve documents from a collection in the database.

MongoDB provides the following methods to read documents from a collection:

• db.collection.find() We can specify query filters or any criteria that identify the documents to return.

Update Operations
Update operations modify existing documents in a collection of the database.

MongoDB provides the following methods to update documents of a collection:

• db.collection.updateOne()
• db.collection.updateMany()
• db.collection.replaceOne() Here, update operations target a single collection. We can also specify any criteria, or filters, that identify the documents to update.

Delete Operations
Delete operations remove documents from a collection in the database.

MongoDB provides the following methods to delete documents of a collection:

• db.collection.deleteOne()
• db.collection.deleteMany() Here, delete operations target a single collection. We can specify any criteria, or filters, that identify the documents to remove.