caseSQL Pro · Live now
On top of the 126 free missions, Pro adds 10 interview-tagged missions from companies that ask these questions (Stripe, Google, Amazon, and 7 more), verifiable path completion certificates you can link on LinkedIn, and a personal analytics dashboard that tells you exactly which concepts to drill next.
$14.99/mo or $139/year — subscribe anytime. Free tier stays free forever · no credit card required.
Pillar 1 · Interview prep
Each Pro mission is framed as a hiring-manager prompt from a specific company, with a full written walkthrough covering the idiomatic solution, one common wrong approach, and the judgment call interviewers listen for. No multiple-choice. No “pick the right aggregate function” drills. The same shape of question you'll see on the panel.
Companies covered
Question archetypes drilled
Pillar 2 · Career-readiness
Finishing a path unlocks a verifiable completion certificate with a share URL you can put on LinkedIn. Your analytics dashboard shows where you're strongest — and specifically which SQL concepts you're still reaching for hints on.
Certificate of completion
Completed September 4, 2025
Code
SAMPLE01
Every certificate has a public verify URL — casesql.com/verify/[code]— that shows the holder's name, path, and completion date. No email or internal IDs are ever leaked.
On your profile, Pro users see 5 charts that answer the questions a serious learner actually asks:
The weakest-concepts chart ranks the SQL topics where you've needed the most hints — so instead of guessing what to practice, you know.
What's included
Fundamentals stay free. Pro adds the interview layer, certificates, and analytics on top.
| Feature | Free | Pro |
|---|---|---|
| Path missions | 50 (10 per path, Starter+Easy) | + 75 Medium/Hard/Expert |
| Coding-interview questions | 12 (3 per difficulty tier) | + 28 Hard/Very Hard |
| General interview questions | 150 (Easy + Medium + light Hard) | + 71 Hard / Very Hard |
| 5-tier Slack-style validator feedback | ✓ | ✓ |
| Progressive hints on every mission | ✓ | ✓ |
| Interview-tagged missions (company × archetype) | — | 10 missions |
| Written solution walkthroughs (idiomatic + common trap) | — | All Pro missions |
| Path completion certificates (verifiable, shareable) | — | All 8 paths |
| Personal analytics dashboard | — | 5 charts |
Pricing
Annual saves ~23% ($11.58/mo billed yearly). Cancel anytime in the billing portal.
Secure checkout powered by Stripe. No long-term commitment, no retention emails. Free tier · no credit card required.
Questions
Yes — subscribe at /pricing. $14.99/month or $139/year. You get instant access to all 10 interview-tagged missions, certificates, and your personal analytics dashboard.
No. The Starter and Easy missions on every career path, the 5-tier validator, and all hints stay free forever. Pro is additive — Medium / Hard / Expert / Master mission tiers, interview-tagged missions, certificates, solution walkthroughs, and analytics — never a paywall on content that used to be free.
Learners actively interviewing for data/analytics roles and mid-career analysts who have finished a path and want more depth. If you're brand-new to SQL, start with the free tier — the fundamentals are all there.
Yes. Monthly plans cancel at the end of the current billing month. Annual plans are pro-rated. No retention emails, no dark patterns.
Company-branded interview missions (Stripe, Google, Amazon, etc.) with full solution walkthroughs, verifiable path completion certificates you can share on LinkedIn, and a personal analytics dashboard that tells you which SQL concepts you're struggling with. Those three things. That's it — no upsells inside Pro.
Still deciding? Try the free tier first — pick a path and ship a few missions.
Come back to subscribe when you're ready to go deeper.