MONGO DB CURD SHORTHAND
----------------------------

INSERT
-------------

db.users.insertOne({
  name: "John Doe",
  email: "john.doe@example.com",
  age: 30
})


db.users.insertMany([
  { name: "Alice", email: "alice@example.com", age: 25 },
  { name: "Bob", email: "bob@example.com", age: 28 }
])







READ
------------------
db.users.find()  


db.users.find({}, { name: 1, _id: 0 })

db.users.find({ age: { $gt: 25 } })

db.users.findOne({ name: "Bob" })
db.users.find().sort({ age: 1 }).limit(5)


Agar multiple Bob ho sakte hain (sab dekhna ho)
db.users.find({ name: "Bob" })

Case-insensitive (bob / Bob / BOB sab chale)

db.users.find({ name: /bob/i })






UPDATE
--------------

db.users.updateOne(
  { name: "Alice" },
  { $inc: { age: 1 } }
)


  db.users.updateOne({ name: "Alice" }, {
  $set: { age: 26 }
})


db.users.updateMany({ age: { $lt: 30 } }, {
  $set: { status: "active" }
})


db.users.updateOne({ name: "Alice" }, {
  $set: { age: 26 }
})


add /remove attribute

db.users.updateOne({ name: "Bob" }, { $set:   -----agar city nahihai to add karega
{ city: "New York" } })  


db.users.updateOne({ name: "Alice" }, {------ city attribute ko remove kar dega
  $unset: { city: "" }
})



DELETE
-----------




db.users.deleteOne({ name: "Alice" })

db.users.deleteMany({ age: { $lt: 30 } })

Deleting All Documents

To delete all documents within a collection, you can use:

db.users.deleteMany({})