Relational Database: Combining Course and Category:

Hey Professionals! Hope you’re doing fine in these tough times.

I am building an app which displays courses (from third party websites) as I am promoting it as an affiliate. But I’m struggling in Relational Database. How could I filter the courses in different categories?

Simply put, Suppose I am adding a business course (data type: course) Now I want to show it in a Category (data type: category) where I would be having this along with marketing, development etc etc and maybe I want to show it under two of them like (category - business and popular/trending). Pardon me for the terminology, I’m actually a beginner.

Can someone help me with this? I hope you don’t mind. Your help would be much appreciated.

Thank You
Rohit Wadhwani