About QueryCraft
A practical SQL course for people who want to do the work.
QueryCraft SQL is designed around a simple idea: SQL becomes useful when learners repeatedly translate business questions into result sets.
Learning principles
The course avoids filler questions and keeps practice tied to SQL concepts: table meaning, row grain, column selection, joins, aggregation, data quality, and database change workflows.
The website and app share one codebase so the web version, iPhone app, and Android app can grow together without splitting the curriculum into separate products.