The keys we need for connecting the two tables are “region” and “certification”, respectively. A key on just one of these columns won’t ensure uniqueness and here is hurdle number one: how do we create a relationship in Power BI that is based on more than one key? Simple answer is that we can’t. But what we CAN do is create a concatenated column with the data we need to create a unique key, and then do our relationships based on that.
Click through for the process.