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Fastest way of updating in MongoDB is update() or save()?
The fastest way of updating is update(). Let us create a collection with documents and see how update() works −
> db.demo320.insertOne({"Name":"Chris"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e50ee51f8647eb59e562066")
}
> db.demo320.insertOne({"Name":"Robert"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e50ee55f8647eb59e562067")
}
> db.demo320.insertOne({"Name":"Mike"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e50ee59f8647eb59e562068")
}
> db.demo320.insertOne({"Name":"Sam"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e50ee5bf8647eb59e562069")
}Display all documents from a collection with the help of find() method −
> db.demo320.find();
This will produce the following output −
{ "_id" : ObjectId("5e50ee51f8647eb59e562066"), "Name" : "Chris" }
{ "_id" : ObjectId("5e50ee55f8647eb59e562067"), "Name" : "Robert" }
{ "_id" : ObjectId("5e50ee59f8647eb59e562068"), "Name" : "Mike" }
{ "_id" : ObjectId("5e50ee5bf8647eb59e562069"), "Name" : "Sam" }Following is the query to update() −
> db.demo320.update({Name:"Mike"},{$set:{Name:"Bob"}});
WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })Display all documents from a collection with the help of find() method −
> db.demo320.find();
This will produce the following output −
{ "_id" : ObjectId("5e50ee51f8647eb59e562066"), "Name" : "Chris" }
{ "_id" : ObjectId("5e50ee55f8647eb59e562067"), "Name" : "Robert" }
{ "_id" : ObjectId("5e50ee59f8647eb59e562068"), "Name" : "Bob" }
{ "_id" : ObjectId("5e50ee5bf8647eb59e562069"), "Name" : "Sam" }
Updated on: 02-Apr-2020
131 Views
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