Assignment

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1️⃣ Introduction to MongoDB (4 Assignments)

Assignment 1: Installing and Setting Up MongoDB

🔹 Task: Install MongoDB on your system and start the MongoDB server. 🔹 Example Command (Terminal):

sudo systemctl start mongod  # Start MongoDB
mongo  # Open MongoDB shell

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Assignment 2: Creating a Database in MongoDB

🔹 Task: Create a database named mydatabase in the MongoDB shell. 🔹 Example Command (MongoDB Shell):

use mydatabase

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Assignment 3: Creating a Collection in MongoDB

🔹 Task: Create a collection named users inside mydatabase. 🔹 Example Command (MongoDB Shell):

db.createCollection("users")

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Assignment 4: Viewing All Collections in a Database

🔹 Task: List all collections inside mydatabase. 🔹 Example Command (MongoDB Shell):

show collections

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2️⃣ Connecting MongoDB with Python (pymongo) (6 Assignments)

Assignment 5: Installing pymongo

🔹 Task: Install pymongo Python library. 🔹 Example Command (Terminal):

pip install pymongo

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Assignment 6: Connecting to MongoDB using pymongo

🔹 Task: Establish a connection to MongoDB in Python. 🔹 Example Snippet:

from pymongo import MongoClient

client = MongoClient("mongodb://localhost:27017/")
print("Connected to MongoDB!")

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Assignment 7: Creating a New Database Using pymongo

🔹 Task: Create a database named company. 🔹 Example Snippet:

db = client["company"]
print("Database created:", db)

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Assignment 8: Creating a Collection Using pymongo

🔹 Task: Create a collection named employees. 🔹 Example Snippet:

collection = db["employees"]
print("Collection created:", collection)

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Assignment 9: Listing All Databases in MongoDB

🔹 Task: Retrieve a list of all databases using pymongo. 🔹 Example Snippet:

print(client.list_database_names())

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Assignment 10: Listing All Collections in a Database

🔹 Task: Retrieve all collections inside company database. 🔹 Example Snippet:

print(db.list_collection_names())

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3️⃣ CRUD Operations in MongoDB (10 Assignments)

Assignment 11: Inserting a Single Document into a Collection

🔹 Task: Insert one employee into the employees collection. 🔹 Example Snippet:

employee = {"name": "John Doe", "age": 30, "department": "IT"}
collection.insert_one(employee)
print("Employee inserted!")

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Assignment 12: Inserting Multiple Documents into a Collection

🔹 Task: Insert multiple employees into the employees collection. 🔹 Example Snippet:

employees = [
    {"name": "Alice", "age": 25, "department": "HR"},
    {"name": "Bob", "age": 28, "department": "Finance"},
]
collection.insert_many(employees)
print("Multiple employees inserted!")

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Assignment 13: Finding a Single Document in a Collection

🔹 Task: Retrieve one employee from the collection. 🔹 Example Snippet:

employee = collection.find_one()
print(employee)

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Assignment 14: Retrieving All Documents from a Collection

🔹 Task: Retrieve all employees from the employees collection. 🔹 Example Snippet:

for emp in collection.find():
    print(emp)

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Assignment 15: Filtering Documents Using a Query

🔹 Task: Retrieve employees whose age is greater than 27. 🔹 Example Snippet:

query = {"age": {"$gt": 27}}
for emp in collection.find(query):
    print(emp)

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Assignment 16: Updating a Single Document in a Collection

🔹 Task: Update the department of "John Doe" to "Management". 🔹 Example Snippet:

collection.update_one({"name": "John Doe"}, {"$set": {"department": "Management"}})
print("Employee updated!")

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Assignment 17: Updating Multiple Documents in a Collection

🔹 Task: Increase the age of all employees by 1. 🔹 Example Snippet:

collection.update_many({}, {"$inc": {"age": 1}})
print("Ages updated!")

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Assignment 18: Deleting a Single Document from a Collection

🔹 Task: Delete an employee with the name "Alice". 🔹 Example Snippet:

collection.delete_one({"name": "Alice"})
print("Employee deleted!")

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Assignment 19: Deleting Multiple Documents from a Collection

🔹 Task: Delete all employees in the HR department. 🔹 Example Snippet:

collection.delete_many({"department": "HR"})
print("HR employees deleted!")

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Assignment 20: Dropping a Collection

🔹 Task: Drop the employees collection. 🔹 Example Snippet:

collection.drop()
print("Collection dropped!")

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