The system has a hierarchical screen flow. Each screen displayed in your Web browser is a static page. If you jump back to a previously displayed screen, you will see the state of that screen at the time you originally displayed it . Complete the displayed Edit form and save your changes by clicking Save. You can also add a record directly from the Edit form by clicking Add.
Most tables have at least one required field.
Most tables also have at least one unique field, such as Name. The save operation will fail unless you enter a unique value in such a field. Some tables in a database may have related tables that they are dependent upon. For example, the contact table in the sample contacts database depends on the category table. Each contact record is linked to a single, valid category, i.e., each contact is a child of a parent category.