SQL
Courses
Oracle SQL - A Complete Introduction https://www.udemy.com/course/introduction-to-oracle-sql/
AWS Essentials (2019) https://www.udemy.com/course/linux-academy-aws-essentials-2019/
Learn Amazon Web Services (AWS): The complete introduction https://www.udemy.com/course/learn-amazon-web-services-the-complete-introduction/
Database Design and Management https://www.udemy.com/course/database-design-and-management/