Experiment 4

Resources & Reference Output

BDA Lab Manual

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Crowdsourced Journal Notes

Optional Reference

Reference Output Document

Journal Writing Part to refer (Made easy)

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Provided to us by Peeyush Hota for making writing part and programs easier. Ignore the Code while writing in your Journal.

Step 1 — Download MongoDB

Go to: https://www.mongodb.com/try/download/community
Select:
- Version: 8.2.5
- Platform: Windows
- Package: msi
Click Download

Step 2 — Install MongoDB

Double-click the .msi file
Click Next → Accept license → Choose Complete
On Service Configuration — leave everything default
Uncheck MongoDB Compass (optional, saves time)
Click Install → Finish

Step 3 — Download & Install mongosh

Go to: https://www.mongodb.com/try/download/shell
Select: Windows → msi
Download → double-click → Next → Install → Finish

Step 4 — Create the data folder

Open Command Prompt as Administrator and run:

mkdir C:\data\db

Step 5 — Add MongoDB to PATH

Press Win + S → search Environment Variables → Open it
Under System Variables → click Path → Edit → New
Add:

C:\Program Files\MongoDB\Server\8.2\bin

Click New again and add:

C:\Users\YourName\AppData\Local\Programs\mongosh

(Replace YourName with your Windows username)

Click OK on all windows

Step 6 — Verify installation

Close all terminals, open a fresh Command Prompt and run:

mongod --version
mongosh --version

Both should print version numbers.

Step 7 — Start MongoDB server

Open Command Prompt Window 1 and run:

mongod

Leave this window open.

Step 8 — Open mongosh

Open a second Command Prompt Window and run:

mongosh

You should see:

test>

Step 9 — Paste and run the experiment

Once you see test>, paste this script:

use("exp4_mongodb");

db.createCollection("Students");
print("Collections:"); print(db.getCollectionNames());

db.StudentsInfo.insertOne({name:"Rushil", age:21, course:"BTech"});

print("\n-- After insertOne --");
db.StudentsInfo.find().forEach(printjson);

db.StudentsInfo.insertMany([
  {name:"Aarav", age:22},
  {name:"Ishita", age:20},
  {name:"Rohan", age:25}
]);

print("\n-- After insertMany --");
db.StudentsInfo.find().forEach(printjson);

print("\n-- findOne Rohan --");
printjson(db.StudentsInfo.findOne({name:"Rohan"}));

print("\n-- findOne from wrong collection (Students) --");
printjson(db.Students.findOne({name:"Rohan"}));

db.StudentsInfo.updateOne({name:"Aarav"},{$set:{age:23}});
print("\n-- After updateOne Aarav age=23 --");
db.StudentsInfo.find().forEach(printjson);

db.StudentsInfo.deleteOne({name:"Rohan"});
print("\n-- After deleteOne Rohan --");
db.StudentsInfo.find().forEach(printjson);

db.Students.drop();
db.dropDatabase();

use("company_db");
db.employee.insertOne({
  Emp_id: "1000rt",
  Personal_details: {First_Name:"Rushil", Last_Name:"Mehta", DOB:"1999-05-12"},
  Contact: {email:"rushil.mehta@gmail.com"},
  Address: {city:"Mumbai"}
});

print("\n-- employee.find() --");
db.employee.find().forEach(printjson);

print("\n-- Projection: Address only --");
db.employee.find({}, {Address:1}).forEach(printjson);

Hit Enter and everything runs.

Note: If mongod says it's already running, skip Step 7 and go directly to Step 8.

Experiment 4

BDA Lab Manual

Crowdsourced Journal Notes

Reference Output Document

Journal Writing Part to refer (Made easy)

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