Exclude columns while downloading the Interactive report data in Oracle APEX

SELECT T.CITYID,

         T.CITYID AS CITYID_DISPLAY,

         T.CITYNAME,

         COUNTRYID,

         (SELECT C.COUNTRYNAME

            FROM COUNTRY C

           WHERE C.COUNTRYID = T.COUNTRYID)

            AS COUNTRYNAME,

         'Delete' Del

    FROM CITIES T

ORDER BY UPPER (T.CITYNAME) ASC

To exclude CITYID while export/download from Interactive Report:

Select the column -->Server-Side Condition -->  Type (PL/SQL Expression) --> Paste below script

nvl(:request, 'EMPTY') not in ('CSV','XLS','PDF','RTF','HTMLD')

and nvl(wwv_flow.g_widget_action, 'EMPTY') <> 'SEND_EMAIL'