About DataHọc
Learn data by doing the work
DataHọc is where beginners write their first query, get feedback right away and improve every day through short lessons and auto-graded practice.
Why we built DataHọc
Most people learning data stop at watching videos and taking notes. Knowledge only becomes a skill when you write the query yourself, hit an error, fix it and see the rows come back.
DataHọc puts practice first: every lesson is tied to a practice problem, every problem is graded in the browser or on the server, with a short explanation of why your result is right or wrong.
How we write content
Real datasets
Practice uses retail, HR, banking, hospital, education and subscription data — close enough to everyday analysis work.
Feedback in seconds
Results appear as soon as you run the query, with the number of passing test cases so you know what is still missing.
A clear path
Each skill has its own lesson order from basics to advanced, plus XP, a day streak and a leaderboard to keep the rhythm.
Available now
- courses
- 15
- practice problems
- 60+
- datasets
- 6
- languages
- 2
Start with your first practice problem
Create a free account to save progress, earn XP and track your rank.