Learning SQL vs Query Dojo

Learn SQL from beginner to advanced with a practical and structured approach. Aprendendo SQL is designed to help you truly understand databases through hands-on practice, real challenges, and step-by-step lessons. Whether you are starting from scratch or improving your skills, the app guides you with clear explanations and interactive content. What you will learn: Master the core SQL commands such as SELECT, INSERT, UPDATE, and DELETE Work with filters and data organization using WHERE, GROUP BY, HAVING, and ORDER BY Understand table relationships with INNER JOIN, LEFT JOIN, and RIGHT JOIN Explore advanced concepts including Views, Stored Procedures, Triggers, and Indexes Practice with real exercises that reinforce learning and build confidence App features: Interactive lessons with clear explanations Practical SQL challenges to test your knowledge Progressive learning from beginner to advanced Self-paced study, learn anytime Designed for students, developers, and professionals Build real SQL skills that you can apply in projects and jobs Start learning SQL today and take your database skills to the next level.

Walk into your SQL interview ready. Query Dojo is SQL interview practice that fits in a few minutes a day. Drill the classic questions, rehearse under a real interview clock, and see exactly what is wrong when a query fails. PRACTICE THE CLASSIC QUESTIONS 85 interview-style SQL challenges, from finding the runner-up salary to top earners per department, monthly retention, login streaks, running totals and medians. Every query runs on a real database, right on your phone. REHEARSE UNDER A REAL CLOCK Timed mock interviews: 25 minutes, 4 questions, no hints. Finish with a readiness score out of 100, so you know where you stand before the real thing. SEE EXACTLY WHY AN ANSWER IS WRONG Every run is checked against the expected result. When it is off, you see what is missing or extra, from columns to rows. Hints and full solutions are there when you are stuck. BUILD QUERIES WITHOUT A KEYBOARD Tap tiles to build real queries, put lines in the right order, or type from scratch. RELEARN WHAT YOU FORGOT 79 bite-size lessons, from SELECT and JOINs to window functions, CTEs, gaps and islands, and finding the median. A PLAN FOR YOUR LEVEL Tell us where you are and get a 4-week belt plan with the topics to focus on first. EARN YOUR BLACK BELT Every challenge and lesson moves you up, from white belt to black belt and beyond, with streaks to keep you consistent. A PLAYGROUND FOR EVERYTHING ELSE Run any SQL against 4 sample databases. Every run is rolled back, so experiment freely. Query Dojo Premium is an auto-renewing subscription, billed monthly or yearly. Payment is charged to your Apple ID at confirmation. It renews automatically unless canceled at least 24 hours before the end of the current period, and you can manage or cancel it in your App Store account settings. Terms: https://querydojo.pages.dev/terms Privacy: https://querydojo.pages.dev/privacy