What does the identifier '$(1)' represent in Qlik Sense?

The identifier '$(1)' in Qlik Sense represents the previous selection. This is a powerful feature that allows data architects and developers to reference what has been chosen before in the user's current session, making it easier to compare or manipulate selections in expressions and calculations.

By using '$(1)', you are effectively telling Qlik Sense to use the data that was selected prior to the current selection, which can be crucial for analyses that require understanding changes in data dynamics over time. This functionality is especially useful in scenarios where maintaining context between selections is necessary, enabling users to create insights based on their navigation through the data.

In contrast, the other identifiers relate to different aspects of selections. The current selection reflects the data currently being viewed, while the records of the current selection pertain to the specific entries tied to user choices at that moment. The full set of records refers to all data available in the application, irrespective of any selections made, which illustrates a broader context without historical reference. Understanding these distinctions helps in effectively utilizing Qlik Sense for data analysis and visualization.