medium

MongoDB Medium

How to perform CURD operations from mongo shell?

How to perform CRUD operations from mongo shell?

MongoDB supports the standard CRUD (Create, Read, Update, Delete) operations for manipulating data in a database. Here are the corresponding CRUD operations available in MongoDB:

Create:

insertOne() : Creates a new document and inserts it into a collection.

db.students.insertOne({
  name: "nitish",
  age: 20,
  email: "[email protected]",
});

insertMany() : Creates multiple documents and inserts them into a collection.

db.students.insertMany({
  name: "saurabh",
  age: 22,
  email: "[email protected]",
});

Read:

findOne() : Retrieves a single document from a collection based on specified criteria.

db.students.find({ name: "nitish" });

find() : Retrieves documents from a collection based on specified criteria.

db.students.find();

Update:

updateOne() : Updates a single document in a collection that matches specified criteria.

db.students.updateOne(
  { name: "saurabh" },
  { $set: { age: 25, email: "[email protected]" } }
);

updateMany() : Updates multiple documents in a collection that match specified criteria.

db.students.updateMany({}, { $set: { age: 25 } });

Delete:

deleteOne() : Deletes a single document from a collection that matches specified criteria.

db.students.deleteOne({ name: "nitish" });

deleteMany() : Deletes multiple documents from a collection that match specified criteria.

db.students.deleteMany();