MongoDB CRUD Operations A Complete Guide

Insert document in MONGO DB

Insert single document

db.collection.insertOne({
name:"UPS",
price:4500,
sale_price:2300	
});

Insert multiple documents

db.collection.insertOne([
{
name:"Printer",
price:9000,
sale_price:8000	
},
{
name:"Mobile",
price: 9500,
sale_price: 7500	
}
]);

Find/Select documents in MONGO DB

Syntax

db.collection.findOne(query, projection)

1. query define condition or critearia
2. projection define the which field will return
   
   

Fetch first document with all the fields

db.collection.findOne()

or

db.collection.findOne({})

Fetch match document with specific fields

db.collection.findOne({name:"ups"},{name:1, sale_price:1})

Note

1. When we want to include field in results we will use 1
2. or when we do not want to include field in results we will use 0

syntax:

db.collection.find(filter, projection);

Delete documents

Syntax

db.collection.deleteOne(filter);

Delete single document

db.collection.deleteOne({_id:2});

Delete multiple documents

db.collection.deleteMany({name:"UPS"});

Update documents in Mongo DB

Syntax

db.collection.updateOne(filter, update);
db.collection.updateMany(filter, update);

db.collection.updateOne(
{_id:2}, 
{
$set:{
   price: 5000
 }
});