The SQL sandbox

Write your own queries freely, with no exercise and no points. On the data of a client from the course, or on a CSV of your own.

Practise SQL online, nothing to install

The sandbox runs real SQL (SQLite) in your browser. Every query starts on a fresh copy of the data, so a DELETE or DROP can't break anything: run it again and it's all back.

It has the data of every client in the course: a coffee roaster, a video store, a festival and more. So you practise on tables you know from the lessons.

Load your own CSV, for example an export from Excel or Google Sheets, and join it with a client's data. Numbers and dates are recognised, and your file never leaves your browser.

New to SQL? Start with the lessons: every concept is explained step by step.

To the lessons