Early access · two levels

Pick your level

Atterna Foundations€19one-time · early-access priceYou can write a query and want to defend the number it givesIncludes: Case rounds: Cases 2–3 · trap drills · Practice, 41 SQL tasks · Sandbox

Find out what a number actually counts before you repeat it
Check a claim on the data: confirm it or break it
Defend the number in a case round

Two cases of about 27 minutes, three short drills and 41 practice tasksAtterna Analyst€59one-time · early-access priceYou already answer work questions with dataIncludes: Meridian episodes 1–8 · everything in Foundations

Take a messy question from a colleague to a decision
Check an A/B test, a cohort and a forecast before anyone acts on them
Write a memo the team can trace and act on

Eight episodes, about an hour each

Not sure yet? Start with Foundations: moving up to Analyst later costs only the €40 difference.

How buying works

Pick a level, leave your emailNothing is charged here.
A payment link within 24 hoursKirill, who builds Atterna, emails it. One-time €19 or €59, no subscription.
Access on the same emailChanged your mind? Full refund within 14 days. Terms

Your email

Nothing is charged now. One-time payment, no subscription · Terms of sale · How we handle your contact

Want to try first? Free: Start: all 10 days with a free account · Case 1: Bigger baskets? · Meridian episode 1 with a free account. Already have access? Sign in

Before you pay

I’m new to SQL. Should I pay now?

No. Start teaches SQL from zero, and all 10 days are free with an account. Come back when case 1 feels within reach.

Start day 1, free →

I know SQL already. What’s left?

Not syntax: each case asks what the number really counts and hides a plausible wrong one. Try case 1 free (17 min) and see if you catch it.

Case 1, free →

Will this help me get a job?

No course can promise that, and we don’t. You get practice on a practice company’s data and a portfolio of your queries and calls to talk an interviewer through.

See a sample portfolio →Practise 5 interview questions, free →

Can I start with Foundations and upgrade later?

Yes. Analyst includes everything in Foundations, so moving up costs only the €40 difference.