CRUD Operations

The terms CRUD (create, read, update, and delete) stand for create, read, update, and delete. The four basic roles of persistent storage are as follows.
CREATE procedures: To create a new record, use the INSERT command. In the SQL relational database application, the Create function is called INSERT. In Oracle HCM Cloud, it is called create.
• db.collection.insertOne() New in version 3.2 in MongoDB
• db.collection.insertMany() New in version 3.2 in MongoDB

READ procedures: The primary keynoted within the input parameter is used to read the table records. The read function is like a search function
• db.collection.find()

UPDATE procedures: Executes a UPDATE statement on the table based on the primary key supplied for a record in the WHERE clause. The update function is used to modify existing records that exist in the database. To fully change a record, users may have to modify information in multiple fields.
• db.collection.updateOne() New in version 3.2 in MongoDB
• db.collection.updateMany() New in version 3.2 in MongoDB
• db.collection.replaceOne() New in version 3.2 in MongoDB

DELETE procedures: In the WHERE clause, deletes a specific record. The delete function allows users to remove records from a database that is no longer needed.
• db.collection.deleteOne() New in version 3.2 in MongoDB
• db.collection.deleteMany() New in version 3.2 in MongoDB