Please ignore my previous reply. It should be like this:
<cfquery datasource="myDSN" name="get_due_file">
SELECT folder, filename
FROM scan_doc
WHERE destroyed = 1;
</cfquery>
<!---
Assuming the output of the query looks like below:
folder = H:\scanned_files\10\
filename = 175.pdf
--->
<cfloop query="get_due_file">
<cffile action="delete" file="#folder##filename#" />
</cfloop>