CRUD (Create, Read, Update, Delete) operations in MongoDB using a simple college student schema.

To gain hands-on experience in performing CRUD (Create, Read, Update, Delete) operations in MongoDB using a simple college student schema.

🧱 Schema (Collection: students)

Each document follows this structure:

{
"student_id": "S001",
"name": "Santhosh",
"age": 20,
"department": "CSBS",
"year": 2,
"cgpa": 9
}
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Baviya Varshini V
Baviya Varshini V
Posted on 5 Oct

CRUD (Create, Read, Update, Delete) operations in MongoDB using a simple college student schema.

beginners

mongodb

database

tutorial
To gain hands-on experience in performing CRUD (Create, Read, Update, Delete) operations in MongoDB using a simple college student schema.

🧱 Schema (Collection: students)

Each document follows this structure:

{
"student_id": "S001",
"name": "Santhosh",
"age": 20,
"department": "CSBS",
"year": 2,
"cgpa": 9
}

⚙ 1️⃣ CREATE (INSERT)
Insert at least 5 student records into the students collection:

db.students.insertMany([
{
"student_id": "S001",
"name": "Santhosh",
"age": 20,
"department": "CSBS",
"year": 2,
"cgpa": 9
},
{
"student_id": "S002",
"name": "Baviya",
"age": 19,
"department": "CSE",
"year": 1,
"cgpa": 8.7
},
{
"student_id": "S003",
"name": "Karthik",
"age": 21,
"department": "ECE",
"year": 3,
"cgpa": 7.2
},
{
"student_id": "S004",
"name": "Anu",
"age": 20,
"department": "CSE",
"year": 2,
"cgpa": 9.3
},
{
"student_id": "S005",
"name": "Ravi",
"age": 22,
"department": "MECH",
"year": 3,
"cgpa": 6.8
}
])
READ (QUERY)

Find all students with CGPA > 8:
3️⃣ UPDATE
(a) Update the CGPA of a specific student

db.students.updateOne(
{ student_id: "S002" },
{ $set: { cgpa: 9.1 } }
)

(b) Increase the year of study for all 3rd-year students by 1

db.students.updateMany(
{ year: 3 },
{ $inc: { year: 1 } }
)
DELETE
(a) Delete one student record by student_id:

db.students.deleteOne({ student_id: "S005" })

(b) Delete all students having CGPA < 7.5

db.students.deleteMany({ cgpa: { $lt: 7.5 } })