python · go · sql · ai · algorithms

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Python, Go, SQL, AI, algorithms and backend. The first lesson of every course is open to try before you sign up.

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root_passEvery paid course on one plan, from $6 per month. No auto-charges.

Learn SQL by running real queries against a real database from the first lesson. Every task is a query you write in the browser, and the trainer runs it against a live SQLite database and checks the result instantly. No setup, no theory you have to take on faith, just the one skill every data job asks for.