If you want to see the sort of things it does, watch the following short video - but it is much more fun to interact with the simulation yourself:
If you visit the project's CodePen page. Tearable Cloth, called a pen in the CodePen jargon, then you can run the program to try it out and both examine and modify the code.
A SQL bootcamp that starts from the very beginning is available from Udemy. While it is based around PostgreSQL, the majority of the lectures are agnostic about the dialect of SQL you're using so coul [ ... ]