Table of Contents
About MongoDB
MongoDB is a popular open-source, NoSQL database, document-oriented management system. It stores data in documents, which are essentially JSON-like objects.
Key Features
- MongoDB doesn’t require a predefined schema.
- MongoDB supports horizontal scaling, making it suitable for handling large amounts of data and high traffic loads.
- MongoDB offers a powerful aggregation framework for performing complex data manipulations and analytics.
Differences in Terminology
| MySQL | MongoDB |
|---|---|
| Table | Collection |
| Row | Document |
| Column | Field |
| Join | Embedded Document |
Useful Command in MongoDB Shell
//to see database
show dbs
// create database and set current db
use studentDB
// to create collection
db.createCollection("studentS")
// to show collections
show collections
// to delete current database
db.dropDatabase()
// to insert one document
db.users.insertOne({name:"Nazim",age:31,languages:["Bangla","hindi"]})
// to see document
db.users.find().pretty()
// to find specific data
db.users.find({name:"Nazim"}