Study hub
Learning Data Engineering, from scratch
A running set of tools built alongside the actual coursework — practice, recall, and revision, growing one topic at a time.
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SQL Practice Sheet
42 scenario-based drills across Levels 1–3, with a Leitner-box review scheduler built in — mark a box after each attempt and the due-for-review panel tracks it from there.
Open practice sheet
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SQL Revision
Same-day and next-day recall checks for whatever was just taught — the piece that catches material before it falls off the forgetting curve, ahead of the longer Leitner cycle.
Preview