A workshop for practical SQL
Learn SQL by actually writing it.
Short lessons, immediate practice. Write real queries against realistic data right in your browser. No sign-up, nothing to install. Every exercise uses the same local workbench, so examples turn into habits quickly.
Runs in your browserPowered by DuckDB91 free lessons
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select c.category_name,
count(*) as products,
round(avg(p.price), 2) as avg_price
from products as p
join categories as c on c.category_id = p.category_id
group by c.category_name
order by products desc, c.category_nameRuns DuckDB in your browser. Nothing is sent anywhere.
Live workbench
SQL engine idle
Starter queries
⌘↵ to run
Run a query to see results. Everything stays in your browser.
Stuck on a query right now?
How it works
Three steps, from your first query to a real report.
1
Pick a lesson
Follow the beginner path from your first SELECT onward. Each lesson is short and focused.
2
Write a real query
Type SQL in the in-browser workbench and run it against realistic sample data.
3
See results, get graded
Results appear instantly. We check your answer and nudge you when it's off.
Start here
The beginner path is one clear line.
91 hands-on lessons across 18 chapters, grouped into simple tracks. Start at the top, with no guessing what comes next.
Begin Chapter 1 →