Sources

List of sources to learn about databases

Books:

1. "Designing Data-Intensive Applications" by Martin Kleppmann

2. "Database Internals" by Alex Petrov

Youtube lectures:

1. "Intro to Database Systems (15-445/645)" and "Advanced Database Systems (15-721)" by Andy Pavlo. Also lectures by CMU Database Group in general.

2. Lectures by Martin Kleppmann on Distributed Systems

3. Lectures by Hussein Nasser. There is also a course on Udemy called "Fundamentals of Database Engineering"