Ch 3 · MongoDB Introduction and Setup · MongoDB
Topic 3 of 3 in MongoDB — Complete Tutorial (Beginner) — 4 lessons.
What is MongoDB?
Get started with MongoDB: understand document databases and perform basic operations. Rather than storing rows in fixed tables, MongoDB keeps flexible JSON-like documents inside collections, and every document gets its own unique _id. That suits data where records vary, such as articles with and without images. You will connect to a database, add a document and read it back.
MongoDB in Code
This is a complete, minimal MongoDB program. Follow each step in order: create a MongoClient for a local server, connect, choose the myapp database and its users collection, insert a user with insertOne, and fetch it with findOne. Notice that every call is awaited and the connection is closed at the end, two habits worth building now.
Practice: What is MongoDB?
Write your first MongoDB script from the starter code. You will connect to a local server, pick a database and collection, insert a document with a name, age and email, then find it and print it before closing the connection. A correct answer awaits every step and prints the stored document, including the _id that MongoDB added.
Solution & Challenge: What is MongoDB?
Compare your script with the worked solution, which stores Bob in a people collection and prints him back. The challenge then covers the full cycle: insert three users with insertMany, list them all with find and toArray, change one user's age with updateOne, remove another with deleteOne, and finally show the two users that remain.