Query Dojo vs Upstream

Land your dream tech job. Query Dojo helps you master database queries through hands-on challenges pulled from real interviews at Meta, Google, Amazon, and Microsoft. Whether you're a student learning SQL for the first time, a data analyst sharpening your skills, or a software engineer prepping for your next interview, this app gets you job-ready. LEARN BY DOING Work through 40+ interactive lessons covering everything from SELECT basics to advanced window functions, CTEs, and subqueries. Every lesson includes hands-on coding challenges where you write real SQL that executes against real databases. INTERVIEW-READY CHALLENGES Practice 50+ questions across Easy, Medium, and Hard difficulty. Write your query, run it, and instantly see if your output matches the expected result. No hand-waving, just real practice. SQL SANDBOX Experiment freely with 4 sample databases. Test queries, explore schemas, and build confidence without limits. TRACK YOUR PROGRESS Stay motivated with daily streaks, accuracy stats, and 20+ achievements. Watch yourself go from beginner to interview-ready. Privacy: https://sql-practice.pages.dev/privacy Terms: https://sql-practice.pages.dev/terms

Upstream is a thinking gym for data analysts. Instead of teaching SQL or dashboards, it trains the skill that matters most: knowing what to ask before you query. HOW IT WORKS You're dropped into realistic workplace scenarios — a stakeholder wants a "quick report," retention looks suspiciously good, or an A/B test shows no lift. Each case challenges you to think critically, ask better questions, and resist the urge to just pull the numbers. Choose your approach at each step. Do you dig into the data immediately, or push back on the request? Challenge the metric definition, or accept it at face value? Every choice reveals how a real analyst would navigate the situation. FEATURES 30+ interactive cases inspired by real data team challenges Placement quiz to assess your analytical instincts and assign your starting rank Four analyst ranks: Query Runner, Report Builder, Sharp Analyst, Question Architect Scoring system that rewards critical thinking over speed Progressive unlock system — earn points to access harder cases Skill tracking across categories like stakeholder management, metric design, and root cause analysis Clean, focused interface with no distractions WHO IT'S FOR Junior data analysts looking to level up their thinking Senior analysts who want to stay sharp Analytics managers who want a training tool for their team Anyone preparing for data analyst interviews Students learning what real analytical work looks like