Hiding fields Key fields can cause confusion in the QlikView frontend. As these fields are used in multiple tables, they can return unexpected results when used in an aggregation function. It is therefore advisable to hide these fields from the frontend view. There are two variables that can be used to hide fields: HidePrefix and HideSuffix. The first variable hides all field names that start with a specific text string and the second one hides all field names that end with a specific text string. To hide our key fields, we can add the following statement at the start of our script: SET HidePrefix='%';