Data Aggregation Courses
The Julia Programming Language via YouTube Advanced SQL for Professional Developers
egghead.io SQL Fundamentals
egghead.io MongoDB Aggregation Framework
egghead.io Get Started With PostgreSQL
egghead.io SQL: A Practical Introduction for Querying Databases
IBM via Coursera Data Analysis in Python: Using Pandas DataFrames
Coursera Project Network via Coursera Power BI Crash Course for Beginners
Data Science Dojo via YouTube Data Mining Crash Course
Data Science Dojo via YouTube Oracle SQL: An Introduction to the most popular database
Udemy