Simple table Join question from a QB newbie

I had the same problem going from SQL to Quickbase because Quickbase does a lot of the heavy lifting.  Under settings for the table you will find Table to Table Relationships and this walks you through connecting the tables and creates the "related" fields.  In your example go to the settings in the Customer table and under Table to Table Relationships select New Relationship.  Select the Order table and then the graphic for Customer has many Orders.  Then you can select what Customer info you want in the order and you can also create summary fields in the Customer like a count of orders or total all orders.  Hope that helped!