Learn SQL visually.
Practice with real data.
QueryFlo pairs visual explanations of SQL concepts with practice on real business data schemas — plus AI tools that evaluate, explain, and grade your queries as you write them.
FROM sales
GROUP BY region
ORDER BY 2 DESC;
Anyone can write SQL now. Few can explain it.
In code reviews and technical interviews, you're tested on both: writing a production-grade query and explaining the logic — without AI.
You write SQL — or AI writes it for you — but you can't explain your query when it matters
Generic SQL tutorials use toy datasets with no real business domains
No feedback on whether your query is production-ready or just "correct"
SQL technical interviewers grade how you explain your logic — not just whether the query runs
See how SQL works. Then practice it on real data.
QueryFlo visually breaks down how SQL concepts work, then gives you real business problems to solve using analytics domain data schemas and feedback that explains your query logic.
See the logic, not just the syntax
Learn and master SQL through visual explanations — build the mental model behind JOINs, WHERE clauses, and GROUP BYs.
Practice on real business data
Practice SQL across marketing, product, finance, HR, and healthcare using realistic schemas and real business questions.
Feedback that teaches, not just grades
Get your query evaluated, graded, and explained so you understand what it does, why it works, and where the logic can improve.
Real schemas. Real business problems.
Every challenge is modeled on how real companies structure their data — across the domains analysts actually work in. More are being added over time.
Built by a former Google Growth Data Scientist, for people who need to understand and explain the SQL they write.
Three steps, every concept.
Watch the concept animate
See exactly what a JOIN, WHERE, or GROUP BY does to your rows before you write a single line.
Practice on a real dataset
Apply it immediately to a business problem, not a toy example disconnected from real work.
Get instant, explained feedback
Understand not just whether your query worked, but why — and what to try differently next time.
Built for business analytics
"Finally, SQL practice that feels like real work. The cohort analysis challenges are exactly what I got asked at my Meta loop."
"The AI Code Reviewer caught three governance issues in my query I wouldn't have noticed. This is how SQL should be taught."
"HEART framework + AARRR in the same platform as SQL challenges? This is the only prep tool I needed for my Google PM data round."
Give every student a way to see SQL — not just read about it.
We're opening a limited number of pilot partnerships with universities, bootcamps, and corporate training teams who want visual, hands-on SQL instruction built into their curriculum.
Tell us enough to plan the first conversation. We usually reply within a few days.
Thanks — we'll follow up within a few days.
Simple, transparent pricing
Start free. Upgrade when you're ready to go deep.
- ✓10 free AI credits
- ✓Daily SQL Task
- ✓Interactive SQL editor
- ✓Growth Analytics Guide
- ✓Limited shareable badges
- ✓Progress & streak tracking
- ✕Advanced lesson practice
- ✕Full 250-challenge library
- ✕Unlimited AI access
- ✕Mock interview
- ✓Unlimited AI credits
- ✓Unlimited Data Sandbox
- ✓Text-to-SQL + AI Judge
- ✓AI Explain + Exec Summary
- ✓Ask the DB — unlimited
- ✓Mock interview
- ✓Advanced AI tools
- ✓Shareable achievement badges
- ✓Progress & streak tracking
- ✓Priority feature requests
- ✓Early access to new content
- ✓Everything in Pro
- ✓Team admin dashboard
- ✓Bulk seat management
- ✓Group progress analytics
- ✓Custom challenge sets
- ✓Private domain schemas
- ✓SSO / SAML support
- ✓Dedicated Slack channel
- ✓Onboarding & training session
- ✓Invoice billing
- ✓SLA & security review
SQL made easy — because you can see it.
Start practicing free, or bring QueryFlo to your institution.