Using MongoDB updateOne() & insertOne()

MongoDB insertOne() inserts a document into a collection, whereas updateOne() update a single document in a collection based on a query filter.

Let us create a collection with documents −

> db.demo735.insertOne({id:1,Name:"Chris"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5ead51b657bb72a10bcf0652")
}
> db.demo735.insertOne({id:1,Name:"David"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5ead51bb57bb72a10bcf0653")
}
> db.demo735.insertOne({id:1,Name:"Bob"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5ead51be57bb72a10bcf0654")
}
> db.demo735.insertOne({id:1,Name:"Carol"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5ead51c757bb72a10bcf0655")
}

Display all documents from a collection with the help of find() method −

> db.demo735.find();

This will produce the following output −

{ "_id" : ObjectId("5ead51b657bb72a10bcf0652"), "id" : 1, "Name" : "Chris" }
{ "_id" : ObjectId("5ead51bb57bb72a10bcf0653"), "id" : 1, "Name" : "David" }
{ "_id" : ObjectId("5ead51be57bb72a10bcf0654"), "id" : 1, "Name" : "Bob" }
{ "_id" : ObjectId("5ead51c757bb72a10bcf0655"), "id" : 1, "Name" : "Carol" }

Following is the query to implement updateOne() & insertOne() −

db.demo735.updateOne({id:1},{$set:{Name:"Robert"}});
{ "acknowledged" : true, "matchedCount" : 1, "modifiedCount" : 1 }

Display all documents from a collection with the help of find() method −

> db.demo735.find();

This will produce the following output −

{ "_id" : ObjectId("5ead51b657bb72a10bcf0652"), "id" : 1, "Name" : "Robert" }
{ "_id" : ObjectId("5ead51bb57bb72a10bcf0653"), "id" : 1, "Name" : "David" }
{ "_id" : ObjectId("5ead51be57bb72a10bcf0654"), "id" : 1, "Name" : "Bob" }
{ "_id" : ObjectId("5ead51c757bb72a10bcf0655"), "id" : 1, "Name" : "Carol" }