Set Theory Courses

Simulate Machine Intel w/Fuzzy Logic, Google Sheets & BigML
Coursera Project Network via Coursera

Discrete Mathematics
Udemy

Discrete Mathematics: Beginner's Complete, Math Crash Course
Udemy

Master Discrete Mathematics: Sets, Math Logic, and More
Udemy

Diseños y métodos de investigación comparativa
University of Naples Federico II via edX

Combining and Filtering Data with PostgreSQL
Pluralsight

Querying Relational Databases Course (How To)
Treehouse

Discrete Mathematics
YouTube

Probability Methods in Civil Engineering
NPTEL via YouTube

Probability/Random Variables
Georgia Institute of Technology via edX