Learn SQL

You can write useful queries in just a few hours. This course takes about 30 hours and goes well past the basics into table design, constraints, aggregations, subqueries, normalization, joins, and performance.

Usually not. SQL has a lot less syntax, and you describe the data you want instead of writing step-by-step logic. The hard part is designing tables well and writing joins and aggregations that return exactly the rows you expect.

SQLite. It runs anywhere and needs no server! Nearly everything you learn here carries over to PostgreSQL and MySQL, and we call out the few features that are SQLite-specific.

No. Every query runs in your browser, so you can start writing SQL right away.

Yes! It's free to create an account and start learning. You'll get all the immersive and interactive features for free for a few chapters. After that, if you still haven't paid for a membership, you'll be in read-only (content only) mode.

We use AI more than most tech companies - not just to build Boots and the Training Grounds, but also to assist us in our coding work... and we're still hiring developers! The demand for technical talent hasn't gone away. Companies need developers that are AI savvy and can modernize their codebases. The way developers work is changing rapidly, but the demand for developers who can build great software remains high. We teach software development skills for the modern AI assisted world, and also have some AI specific courses like how to build your own Agent.

It's completely up to you. The time it will take you to be "job ready" will depend on how much you already know, how often you study, and how long you study for. That said, the backend career path takes many people about 12 months.

• How long to become a backend developer

Absolutely! If you built it, use it. You'll build several personal projects while completing our curriculum, and our final course about finding jobs will show you how to construct a job-ready portfolio.

We're not a $10,000 bootcamp. We're not a $50,000 university degree. We are a self-paced, gamified online learning platform for learning back-end web development and computer science. You can learn with us for the price of a gym membership.

We focus on teaching backend-development and data-related skills, which is somewhat of a rarity in online learning. We're also focused on solving what we believe is the hardest problem with online learning: boredom. If you prefer coding rather than watching, and your struggle with online learning is staying motivated and engaged, we think you'll like learning with us.

• Read about our methodology