This is the essential guide to MongoDB! Learn the entire CRUD cycle (Create, Read, Update, Delete) with practical examples using the Mongo Shell (mongosh). We'll cover all four operations using a simple users collection.

What you will learn:

CREATE (Insert): How to add new documents using insertOne and insertMany.

READ (Find): How to query for data using findOne (to get one document) and find (to get many documents).

UPDATE (Modify): How to change existing documents using updateOne and updateMany with the $set operator.

DELETE (Remove): How to remove documents using deleteOne and deleteMany.

Example CRUD Workflow:

C: db.users.insertMany([ { name: "Alice", age: 30 }, { name: "Bob", age: 25 } ])

R: db.users.find({ age: { $gt: 28 } })

U: db.users.updateOne({ name: "Alice" }, { $set: { city: "New York" } })

D: db.users.deleteOne({ name: "Bob" })

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