Welcome to your personal SQL interview console 👋
This app turns the 300+ Real SQL Interview Questions PDF into a fully interactive practice ground — no external database setup required. Everything runs locally in your browser using SQLite compiled to WebAssembly (sql.js).
- Every question is tagged Easy / Medium / Hard and by topic (joins, window functions, recursive CTEs, etc.) — track your progress by difficulty.
- Each question shows the exact sample tables it uses, with real seed data (Indian-company flavoured — employees, departments, customers, orders, sales…).
- Write your query in the editor and hit Run to see live results against the sample data. Tab now works properly for indenting your code.
- Stuck? Reveal progressive hints — concept nudge → approach → clause structure — before jumping to the solution.
- Verify compares your query's output against a live-computed correct answer and tells you exactly what differs.
- Show Solution now includes a full beginner walkthrough: step-by-step approach + a plain-English glossary of every clause/function used.
- Use ◀ Prev / Next ▶ to move through questions, and the Full Schema & Data Browser to explore every table and every row.
- Your progress (solved questions, stars) is saved in this browser automatically.
Pick any question on the left to get started. Good luck — All the best for your IIM Calcutta placements! 🎯