Bundle of Graphs vs SQLx

This app was produced with the support of The Institution of Engineering and Technology. All the games are played using touch control only. The app includes pages detailing the mathematical ideas behind the graphs and links to webpages featuring activities and applications of the graphs.

SQLX is the most hands-on way to learn SQL on iPhone. Whether you're starting from scratch or preparing for your next job interview, SQLX takes you from the basics all the way to advanced techniques — step by step. LEARN BY DOING Every lesson ends with a real SQL challenge. Write actual queries, hit Run, and see instant results. No passive theory — just you and the database. 12 MODULES, FULLY STRUCTURED Each module builds on the last, covering everything you need: · SELECT & Filtering (WHERE, ORDER BY, LIMIT) · INSERT, UPDATE, DELETE · Schema Design (CREATE / DROP TABLE) · JOINs (INNER, LEFT, RIGHT) · GROUP BY & Aggregations · Subqueries & Correlated Queries · Common Table Expressions (CTEs) · CASE WHEN & Conditional Logic · UNION & Set Operations · Window Functions (ROW_NUMBER, RANK, AVG OVER) LIVE SQL LAB Practice freely in a built-in SQL playground. Choose from ready-made sample databases — e-commerce, HR, construction — or build your own schema from scratch and run any query you like. 6 CAREER PATHS Pick a structured path tailored to your goal: · Data Analyst (8 hrs) · BI Analyst (12 hrs) · Backend Developer (14 hrs) · Data Engineer (15 hrs) · Product Analyst (10 hrs) · SQL Interview Prep (16 hrs) EARN AS YOU LEARN Stay motivated with daily streaks, XP points, and 17 unlockable badges. Finish certification exams to earn verifiable certificates at Beginner, Intermediate, and Senior levels. WORKS OFFLINE All content is built into the app — no internet required. Learn on the subway, on a flight, anywhere. PRIVATE BY DESIGN No ads. No tracking. Your progress stays on your device and syncs privately through iCloud. Download SQLX and write your first query today.