Learn SQL - Database & Queries

Learn SQL by writing real queries from your very first lesson. Interactive, bite-size courses take you from SELECT to advanced JOINs — with an AI mentor that explains every result. SQL is the language of data: every company, every job board, every analytics role asks for it. This app makes it stick by making you type, run and fix real queries instead of watching someone else do it. Five minutes a day is enough to go from "what is a database?" to querying like a professional. WHAT YOU'LL BE ABLE TO DO • Read and write real SQL queries — SELECT, WHERE, ORDER BY, GROUP BY • Combine tables with INNER, LEFT and multi-table JOINs • Summarize data with aggregate functions, HAVING and subqueries • Create, update and manage tables and databases with confidence • Understand how MySQL, PostgreSQL and SQLite differ in practice • Answer the SQL questions that show up in data and developer interviews YOUR LEARNING PATH 1. Foundations — tables, rows and your first SELECT statements 2. Core querying — filtering, sorting, grouping and functions 3. Multiple tables — JOINs, keys, relationships and subqueries 4. Practical SQL — real-world datasets, edge cases and interview-style practice EVERYTHING YOU NEED IN ONE APP • 45+ courses and 180+ interactive lessons, beginner to advanced • Practice on real queries with instant feedback — right on your phone • AI mentor, 24/7 — ask why a query fails and get a clear, personal answer • Bite-size lessons designed to finish on a coffee break • Quizzes and challenges that turn syntax into instinct • Earn certificates as you complete courses • Learn in 20+ languages TOPICS COVERED SELECT · WHERE · ORDER BY · GROUP BY · Aggregate Functions · JOINs · Subqueries · Keys & Constraints · CRUD Operations · Table Design · MySQL · PostgreSQL · SQLite WHY IT WORKS Nobody learns SQL by reading about it. Every lesson here is interactive: you predict the result, write the query, see the data come back and fix your mistakes on the spot. That feedback loop is what turns beginners into people who think in queries — usually faster than they expected. WHO IT'S FOR • Analysts, marketers and managers who want to pull their own data • Backend, web and mobile developers adding databases to their skill set • Students and career-switchers heading into data roles • Anyone with a SQL interview on the calendar START FREE TODAY Download Learn SQL: Query & Practice and run your first real query in the next five minutes. Your first course is free — your data skills start now.