MintQuery vs Quizzelo

Learn SQL in five minutes a day, on your phone, from your very first query to interview level. Every lesson teaches one idea and shows the query working one row at a time. Then you practice it straight away: tap the blocks, or type the query yourself. On iPhone, Android and the web. Start on one, carry on with another: your progress syncs. Every day there’s also one real SQL interview question, from companies like Airbnb and Amazon, in collaboration with StrataScratch. Free for everyone. TWO COURSES - SQL Fundamentals (beginner): nine modules, from your first SELECT to window functions - Real-World SQL (intermediate, new): six modules on the messy data you meet at work, like duplicates, missing values, messy text, and joins that count things twice WHAT YOU’LL LEARN - SELECT, FROM, WHERE: the building blocks of every SQL query - Filtering, sorting, and grouping data - Aggregate functions: COUNT, SUM, AVG, MIN, MAX - JOINs: combining data from multiple tables - Subqueries: in WHERE and FROM, IN, correlated subqueries and EXISTS - Window functions: ROW_NUMBER, RANK, DENSE_RANK, LAG, LEAD, running totals and window frames - CASE expressions and date functions - Spotting the traps in real data before your numbers go wrong All in real PostgreSQL syntax. FEATURES - A daily SQL interview question from real companies - The Challenge library: every past daily question plus extra challenges, from easy to interview level - 8 exercise types, including fill-in-the-blank, query builder, and debug challenges - Type your answer or tap the blocks; typed answers are checked by their result - AI tutor that explains concepts and gives hints without giving away the answer - Practice rounds that bring back the questions you missed, from both courses - Streaks and badges: lessons and the daily question both count - A shareable certificate for each course you finish WHO IT’S FOR MintQuery is for beginners learning SQL for the first time and career switchers moving into data analytics (SQL Fundamentals), analysts who want practice on messy, real-world data (Real-World SQL), and anyone preparing for SQL interviews (the daily questions and Challenge library). No laptop needed. WHY MINTQUERY No hearts, no energy timers, no ads, no waiting hours to continue a lesson. Make mistakes freely: that’s how you learn. MintQuery is free to use, including the daily question, the first three modules of SQL Fundamentals and the first two of Real-World SQL. Premium unlocks every module of both courses, the Challenge library and unlimited AI tutor help, available as a monthly or annual auto-renewing subscription. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://mintquery.app/privacy Terms of Service: https://mintquery.app/terms

Quizzelo turns studying into a game you actually want to play. TRIVIA THAT ADAPTS TO YOU Play quiz sessions across dozens of categories, from science and geography to test prep like SAT, GRE, TOEIC, and TOEFL vocabulary. Every answer updates your skill rating, so questions stay challenging without becoming frustrating. Get instant feedback and clear explanations after every question. Create your own custom categories for anything you want to learn. FLASHCARDS WITH SPACED REPETITION Build decks in seconds and review them with a proven spaced repetition schedule. Cards you know well come back later, cards you miss come back sooner. Rate each card with one tap and let Quizzelo plan your next review. STUDY PACKS, GENERATED FOR YOU Paste your notes or describe a topic, and Quizzelo builds a ready-to-study set of flashcards and quiz questions. BRAIN GAMES AND DAILY PUZZLES Train memory and reflexes with quick games: sequence memory, number memory, reaction time, and higher-or-lower. Come back every day for a fresh Connections puzzle. AND MORE Track your progress per category with skill tiers from Bronze to Platinum. Handy calculators for everyday decisions, including retirement and buy-vs-rent. Sign in with Apple or Google, and your progress syncs with Quizzelo on the web. Quizzelo is free to play. Quizzelo Plus unlocks skill ratings with adaptive difficulty, AI question explanations, and monthly AI study packs. Terms of Use: https://quizzelo.com/terms Privacy Policy: https://quizzelo.com/privacy