Go to Automation Studio > Activities > SQL Query > All SQL Query > Query > DESelect.
You'll see 2 subfolders:
- System: this folder contains all query activities generated by DESelect to create previews and count the number of results in a selection. Do not delete this folder or modify/delete the query activities in it.
- Selections: this folder contains the query activities created when a user clicks the Run button on a selection in DESelect. The names of the query activities match with the name of the selection, followed with a unique number.
You can freely move the SQL Query Activities from the Selections folder to any other query activities folder.