Is this for total beginners or does it also cover advanced features like window functions as well? If not, is there a similar tool for learning advanced SQL features?
I personally enjoyed https://pgexercises.com/ a lot. As much as I'm not an SQL expert by any means, I learned things most of my peers would find "too complex" while doing those exercises.
The site is interactive, but you can also download the dataset and do the exercises on your own database, if you so desire.
The site is interactive, but you can also download the dataset and do the exercises on your own database, if you so desire.