Technical details
The app runs entirely in the browser. SQL.js provides a SQLite engine with selected Databricks-style SQL adaptations. Chapter content, labs, and SQL practice are split into separate downloads. Hash routing and relative asset paths let the app run under this site's /databricks/ path.
The release review passed 153 unit tests, 77 development/production browser checks, and the production build. Content targets the October 30, 2025 exam guide, with verification flags for two documentation ambiguities. The home page links to the official exam page and guide.