The Phase 1 exit gate. Ten interview-grade SQL problems on a SaaS analytics dataset — sessionization, cohort retention, NRR, percentiles, anti-joins, gaps-and-islands, running totals and top-N per group. Pass this and nobody can question your SQL.
75 min
10
70%
-
This test will run in full-screen mode with a timer
Unlimited attempts included — each new attempt pulls a fresh set of questions.
See how you rank against others