Answer
A field is used to hold and store specific information in a column in one of the database tables of your Joomla installation. If you want to show a field in Joomla, you need to create a view with a table in the Component Generator. Just add/edit a view in a component and select the database table with the fields just created. Once a connection has been made between the table and the new view, the fields will be visible in both the site and the administration of your Joomla installation. To simplify the process, we have made it possible for you to create a view and add a table at the same time. After the table and the view has been created, you will be able to add your fields.
The Joomla Component Generator can create many different field types. E.g. text field, calendar, category, media, foreign key, color picker and a lot of other fields as well. Options for lists like drop down, radio etc. can be defined as key/value pairs. This allows you to customize the generated component exactly for your needs.