Courses with gamification for SQL and data mining?

Question

SQL

Tell me good examples of such courses, so far I have only found this:
datamonkey.pro
is very cool, but there are few materials.
Perhaps the creators are sitting here, by the way, so - hello :)

Answer 1

Here is a great site with SQL exercises and rating of participants:
www.sql-ex.ru
It goes well with this online tutorial with interactive tasks:
www.sql-tutorial.ru/ru/content.html