Prac 1

 1A)use Krish

drop.database()

1B)show dbs

use Krish

db.createcollection("emp")

db.createcollection("emp1")

show collections

db.emp.drop()

show collections 

1C)use Krish

db.createcollection("emp")

db.emp.insertMany([{"Name":"Krish","Age":20,"email_id":"krish123@gmail.com"},{"Name":"Trish","Age":21,"email_id":"trish123@gmail.com"},{"Name":"Hrish","Age":22,"email_id":"hrish123@gmail.com"},{"Name":"Vrish","Age":23,"email_id":"vrish123@gmail.com"}])

db.emp.find()

db.emp.updateOne({Name:"Krish"},{$set:{Age:24})

db.emp.deleteOne({Name:"Trish"})

Or

use Krish

db.createCollection("emp")

db.emp.insertMany([

  { "Name": "Krish", "Age": 20, "email_id": "krish123@gmail.com" },

  { "Name": "Trish", "Age": 21, "email_id": "trish123@gmail.com" },

  { "Name": "Hrish", "Age": 22, "email_id": "hrish123@gmail.com" },

  { "Name": "Vrish", "Age": 23, "email_id": "vrish123@gmail.com" }

])

db.emp.find()

db.emp.updateOne({ Name: "Krish" }, { $set: { Age: 24 } })

db.emp.deleteOne({ N

ame: "Trish" })