What is the primary use of the When prefix in QlikView?

The When prefix in QlikView is primarily used to create conditional clauses that evaluate records during the data load process. This allows a data architect to specify conditions that determine whether a particular record should be included in the data model or what transformations should apply to that record based on certain criteria. Using When enables dynamic handling of data based on predefined logic, making it easier to filter and process data selectively.

For instance, you can write a statement such as "When , then " to apply conditions that guide the loading of only those records that meet specific criteria, which is particularly useful when dealing with large datasets that contain irrelevant or unnecessary information.

This application of the When prefix helps streamline data loading and ensures that only pertinent data is processed in the analysis, enhancing the overall efficiency and relevance of the data model. The other options focus on different aspects of data management in QlikView that do not pertain to conditional evaluations, making them less applicable in this context.