DESelect needs a few folders to store the Data Extensions and query activities DESelect generates. These folders are automatically generated in each business unit DESelect is enabled.
Data Extensions folder
Under Data Extensions, DESelect creates a folder called DESelect, which contains the data extensions
created to write the preview results to.
This folder may not be deleted.
Query Activities folder
DESelect creates a folder called DESelect under Query Activities > All SQL Query > Query.
This folder has 2 subfolders: Selections and System.
Selections contain the SQL queries DESelect creates, with one query activity for each selection in
DESelect. These query activities can be used in automations.
System contains other query activities necessary to generate the previews and count the number of
records in the preview and the final query. These query activities should not be used directly by users.
None of these folders may be deleted.