Tuto WEBDEV 25

86 Part 2: My first database Creating the links We have created all the descriptions of the data files necessary for the product management application. We are now going to create the links between data files. A link is used to define the integrity constraints (cardinalities) between two data files. ▶ First, let’s create the link between the "Customer" and "Orders" data files: a customer can have one or more orders, and each order is linked to a customer. 1. On the "Analysis" pane (found in the ribbon), in the "Creation" group, click "New link". The mouse cursor turns into a pen. 2. Click the "Customer" data file, then the "Orders" data file. 3.  The wizard for link creation starts. 4. Answer the questions asked by the wizard: