🎓 CAREER TRACK

Explain Your Query

The SQL interview and the work after it, answered on a hospital network's six tables: why SQL persists, reading tables you have never seen, dialects, how a query runs, SQL against spreadsheets, Python and document databases, keys and duplicates, joins, WHERE and HAVING, CTEs, window functions and performance, then a take-home and a live test worked end to end. One brief, one notebook for the whole book, seventeen tasks: one per chapter of the book Explain Your Query, each with an automatic check. Everything runs in the browser. Views you create are gone after a page reload until you press Run all, so after reopening the project press Run all before running anything else.