In summary, here are 10 of our most popular relational+databases courses

• Relational Databases: Birla Institute of Technology & Science, Pilani
• Building and Working with Relational Databases: Illinois Tech
• Databases for Data Scientists: University of Colorado Boulder
• SQL for Data Analysis and Business Insights: Coursera
• Enterprise Data Wrangling with SQL and Python: Northeastern University
• Data Modeling & Warehousing Fundamentals in Data Engineering: Coursera
• SQL Data Quality, Security, and Governance: Coursera
• Introduction to Relational Databases (RDBMS): IBM
• SQL: A Practical Introduction for Querying Databases: IBM
• Normalize Relational Databases for Peak Performance: Coursera