The following article is going to walk you through connecting your Fusion created data warehouse to Tableau.
When opening Tableau you are going to see the following window. On this page you are going to click "MySQL".
You will then be prompted to enter your warehouse credentials. This information can be found in the Fusion Portal. You can learn more about how to get these credentials here.
After clicking 'Sign In" you should be all set and connected to your Fusion created data warehouse.