Exploring MongoDB CRUD Operations

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Exploring MongoDB CRUD Operations: A Beginner’s Guide

MongoDB is one of the most popular NoSQL databases out there — and for good reason! It’s built for cloud-based, scalable apps that need flexibility and speed. Instead of storing data in strict tables like traditional databases, MongoDB uses JSON-like documents that feel much closer to real-world data. For example, representing students in a college database becomes super simple and natural.

At the heart of MongoDB are the four key CRUD operations — Create, Read, Update, and Delete. These let you add new data, view it, modify it, or remove it when needed.

In this blog, we’ll get our hands dirty performing CRUD operations on a student database. You’ll learn how to:

Insert multiple student records
Fetch and filter data using queries
Update details such as CGPA or academic year
Delete specific student records

We’ll use MongoDB Atlas, the cloud-based version of MongoDB, to make everything easy and accessible. By the end, you’ll have a solid, practical understanding of how MongoDB works — and why developers love using it for modern applications.

Schema – Collection: students
Each student record (document) follows this structure:

{
"student_id": "ST001",
"name": "Aarav",
"age": 20,
"department": "AI & DS",
"year": 2,
"cgpa": 8.9
}

CREATE (INSERT)
In MongoDB Atlas → Collections → Insert Document

{
"student_id": "ST001",
"name": "Aarav",
"age": 20,
"department": "AI & DS",
"year": 2,
"cgpa": 8.9
},
{
"student_id": "ST002",
"name": "Diya",
"age": 19,
"department": "CSE",
"year": 1,
"cgpa": 9.2
},
{
"student_id": "ST003",
"name": "Rahul",
"age": 21,
"department": "ECE",
"year": 3,
"cgpa": 7.8
},
{
"student_id": "ST004",
"name": "Meera",
"age": 20,
"department": "IT",
"year": 2,
"cgpa": 9.5
},
{
"student_id": "ST005",
"name": "Vikram",
"age": 22,
"department": "MECH",
"year": 3,
"cgpa": 6.9
}