Are there problem books on relational algebra and database normalization?

Question

Database

Interested in problem books with answers. Googled - found nothing sane. Hope for you))

Answer 1

That's a good question you asked.) Here's what we found:
db4u.wikidot.com/normexercises
https://cs.senecac.on.ca/~dbs201/pages/Normalizati...
https://web.csulb.edu/~mopkins/cecs323/morenormali. ..
https://lagunita.stanford.edu/courses/DB/RA/SelfPa...
https://www.seas.gwu.edu/~bhagiweb/cs2441/lectures...
Garbage of course, so I'll subscribe to the question , good exercises would come in handy. I won’t even try to look in Russian.