Beginner SQL Interview Drills: FLOOR 1
Five problems, five minutes each. The questions are beginner-level; the clock is not.
Mission briefing
Floor 1 drills the beginner SQL interview questions every data analyst gets asked, re-skinned as agency work. Find the second-highest clearance in a personnel table. Spot duplicate transmission frequencies. Pull the Nth-ranked operative. Identify ghost agents who appear in one table but not another. Trace consecutive-day mission streaks.
Each problem is a multi-stage case with its own schema and a five-minute, server-enforced timer. Solve the warm-up stage, then the real question, before time runs out. Miss the window and you can retry immediately.
These map directly to classics like 'second highest salary' and 'find duplicate emails'. If you have a screening call coming, this floor is the fastest warm-up available, and it is free.
For the full format, timers, and scoring details, see the Interview Mode page.
Related guides
Free guides that pair well with this chapter:
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