It's finally time to create a relationship between the temperature table and internet sales table. The key on the Temperature table is a combination of the region name and the month number of the year. This column combination makes a single row unique in this table, as shown in the following screenshot:
Figure 6-Column combination that makes a single row unique
Unfortunately, neither of those two columns currently exist in the Internet Sales table. However, the Internet Sales table has a relationship to the Sales Territory table, and the Sales Territory table has the region. Therefore, you can determine the region ...
