Solve interview-style SQL problems, explore real-world case studies, play story-driven puzzles, and track progress — all in one clean workspace.
Free to start · Pro plans from ₹199/mo
95+
Questions
16
Puzzles
20
Case Studies
27
Roadmap Topics
4
Challenges
Free
to Start
How it works
Choose from questions, puzzles, or case studies sorted by difficulty.
Code directly in the browser with syntax highlighting & autocomplete.
Instant result comparison & progress tracking across all problems.
Features
50+ SQL interview problems with instant feedback
16 story-driven narratives that teach SQL
Real-world scenarios from top companies
Complete 27-topic roadmap with examples
Solved / visited stats across all challenges
Unlock premium content & advanced challenges
Learning Roadmap
27 topics with syntax, examples, common mistakes, and interview tips
SQL Puzzles
16 immersive narratives that turn SQL practice into an adventure
Case Studies
Full schemas, datasets, solutions, and explanations from actual industry scenarios
Mini Tools
No signup, no backend round-trips — format, convert, and generate right on the page
Beautify messy queries in 5 dialects
Upload CSV, get CREATE TABLE + INSERTs
Convert JSON arrays into INSERT statements
Generate v4 and v7 UUIDs instantly
Convert timestamps across 26 timezones
See how INNER, LEFT, RIGHT & FULL work
Articles
Guides, deep dives, and practical SQL tips — written to make you interview-ready
A single-page SQL reference covering JOINs, window functions, CTEs, NULL handling, CASE WHEN, string/date functions, constraints, common query patterns, and more.
Read article→Best PracticesLearn how SQL injection attacks actually work — authentication bypass, UNION-based data exfiltration — and how parameterized queries prevent them structurally.
Read article→Best PracticesLearn to write idempotent SQL for migrations, seed scripts, and ETL jobs — safe upserts, guarded schema changes, and the relative-update trap that compounds on re-run.
Read article→