> Jennifer Widom, Databases, Stanford. This is not the flashiest of a topic, but oh boy was it well organized.

Couldn't agree more. I took this course in 2011 but didn't have a need for working with databases until 2014. Three years after I took the course I was able to jump in and work fluently on databases -- Mongo, Sqlite, Firebase, etc. The least I can say is the course helped me internalize database concepts.

This course has the right amount of handholding yet challenges you enough so you acquire long-lasting skills.