List field are used to order the queries of the database list.
Visit the database management page and click manage list fields.
You can add multiple list fields to a database. For example in one list you want to order the entries per input date. While on another list you want to order them by alphabetic name.
(1) Add a name for your list field
(2) Select the type of field: text, number or date
(3) Click add to add another list field
(4) You can delete a list field
(5) You can update the list field type