MongoDB

Introduction

In this blog, we will gain practical experience performing CRUD (Create, Read, Update, Delete) operations in MongoDB. We will use a simple college student schema in a students collection and run queries on MongoDB Atlas.
Schema (Collection: students)
Each student document should follow the structure below:
{
"student_id": "S001",
"name": "Santhosh",
"age": 20,
"department": "CSBS",
"year": 2,
"cgpa": 9
}

Create (Insert)
CREATE A DATABASE CALLED COLLEGE_STUDENTS AND A COLLECTION CALLED STUDENTS

Insert at least 5 student records into the students collection.

Read (Query)
Display all student records.

Find all students with CGPA > 8.

Find students belonging to the Computer Science department.

Update

Update the CGPA of a specific student.
modify cgpa of Faith to 8.3

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

after

Delete

Delete one student record by student_id.

*Delete all students having CGPA < 7.5.
*

Conclusion

Mastering CRUD operations in MongoDB is fundamental for building efficient and scalable applications that rely on flexible, document-based data storage. By understanding how to Create, Read, Update, and Delete data effectively, developers can leverage MongoDB’s powerful querying capabilities and schema flexibility to manage data in real-time applications with ease. Whether you’re building a small project or a complex system, a solid grasp of these operations ensures that your data management is both robust and performant.Thanks to @santhoshnc for the guidance.