Last updated: October 22, 2026
By creating an account or using DataHọc you agree to the terms below. If you do not agree, please do not continue using the service.
1. Accounts
You must provide a valid email address and keep your password safe. Activity under your account is your responsibility.
Use one account per person. We may suspend accounts that show signs of abuse, spam or harm to other learners.
2. Learning content
Lessons, problem statements, datasets and solutions on DataHọc are written for learning. You may use them for personal study and non-commercial teaching with attribution.
Do not copy the content wholesale to resell, republish publicly or include in a commercial product without written permission.
3. Submissions and XP
SQL submissions are stored to grade them and show your history. XP is awarded once per problem when the result passes.
We may adjust XP or ranks if we detect cheating, such as automated submissions or multiple accounts used to inflate scores.
4. Prohibited behaviour
Do not attack, scan or overload the service. Do not deliberately run queries that damage the grading database. Do not upload content that breaks the law or the rights of others.
5. Changes to the service
DataHọc is still under development. We may add, change or pause features, and we will update these terms when a change is significant.
6. Contact
Questions about these terms can be sent to hello@datahoc.dev.