Getting Started with MongoDB

In this tutorial, we’ll be learning how to use MongoDB to store and retrieve data. We’ll be using the MongoDB shell for this tutorial, but there are also several other ways to interact with MongoDB, including using drivers for your favorite programming language.

1. Install MongoDB The first step is to install MongoDB. You can download the latest version from the MongoDB website (https://www.mongodb.com/download-center/community). After you have installed MongoDB, open a terminal window and start the MongoDB daemon by running the following command:

Copy codemongod

2. Connect to MongoDB To connect to the MongoDB server, open a new terminal window and run the following command:

Copy codemongo

3. Create a Database Once you’re connected to the MongoDB server, you can create a database by running the following command:

perlCopy codeuse mydb

This will create a new database called “mydb”. If a database with that name already exists, you’ll switch to it.

4. Create a Collection To store data in MongoDB, you’ll need to create a collection. A collection is similar to a table in a relational database. To create a collection, you can run the following command:

pythonCopy codedb.createCollection("customers")

This will create a new collection called “customers”.

5. Insert Documents With your collection created, you can now insert documents into it. A document is similar to a row in a relational database. To insert a document, you can run the following command:

phpCopy codedb.customers.insert({ name: "John Doe", address: "123 Main St." })

6. Query Documents To retrieve data from MongoDB, you can use the find() method. For example, to find all documents in the “customers” collection, you can run the following command:

luaCopy codedb.customers.find()

This will return all documents in the collection.

7. Update Documents To update a document, you can use the update() method. For example, to update the address of a customer with the name “John Doe”, you can run the following command:

cssCopy codedb.customers.update({ name: "John Doe" }, { $set: { address: "456 Main St." }})

8. Delete Documents To delete a document, you can use the remove() method. For example, to delete the customer with the name “John Doe”, you can run the following command:

csharpCopy codedb.customers.remove({ name: "John Doe" })

And that’s it! You now know the basics of how to use MongoDB to store and retrieve data. There’s much more you can do with MongoDB, such as creating indexes, using the aggregation framework, and more. For more information, be sure to check out the official MongoDB documentation.