Simple College Student Schema

MongoDB is one of the most popular NoSQL databases, widely used for scalable and flexible applications. In this tutorial, we’ll perform CRUD (Create, Read, Update, Delete) operations on a college students collection to understand MongoDB better.

To make it more exciting, we’ll run these queries directly on MongoDB Atlas Cluster (cloud-based MongoDB). Along the way, I’ll include screenshots of my MongoDB Atlas dashboard and outputs so you can follow along visually.

Creating a Cluster

Create a free MongoDB Atlas account
Schema

Create a cluster and a database called collegeDB

Inside it, create a collection called students

Schema

Each student document follows this structure:

*Create *(Insert)

Insert at least 5 student records:

{
student_id: "S001",
name: "Jamie",
age: 19,
department: "CSBS",
year: 2,
cgpa: 8.5
}

{
student_id: "S002",
name: "David",
age: 21,
department: "CSE",
year: 3,
cgpa: 9
}

{
student_id: "S003",
name: "Natalia",
age: 18,
department: "ME",
year: 3,
cgpa: 8.7
}

{
student_id: "S004",
name: "Olivia",
age: 22,
department: "ECE",
year: 4,
cgpa: 8.5
}

{
student_id: "S005",
name: "Jonathan",
age: 20,
department: "IT",
year: 3,
cgpa: 7.9
}

Read (Query):-

Display all student records.

Fetch all students: {}

Find all students with CGPA > 8.

db.students.find({ cgpa: { $gt: 8 } })

Find students belonging to the Computer Science department.

db.students.find({ department: "CSE" })

Update:-

Update the CGPA of a specific student.

{ "student_id": "S005" }

Increase the year of study for all 3rd year students by 1.

{ "year": 3 }

Delete:-

Delete one student record by student_id.

{ "student_id": "S004" }

Delete all students having CGPA < 7.5

{ "cgpa": { "$lt": 7.5 } }

🚀 Wrap Up

In this tutorial, we learned how to:

Insert new student records

Query students by CGPA and department

Update CGPA and year of study

Delete students based on conditions

MongoDB CRUD operations form the foundation for building real-world apps like college portals, e-learning systems, or admin dashboards.

Thanks to @santhoshnc sir for guiding and motivating us.