corretto order join

LoadCSVData.pl

@@ -163,21 +163,16 @@ sub trxelab {
     my $sthdo = $dbh->do(
         qq{
     select * from  (
-      (
         select 'ToolNameID', 'EventDate', 'EventTime', 'NodeNum', 'NodeType', 'NodeDepth',
         'XShift', 'YShift', 'ZShift' , 'X', 'Y', 'Z', 'HShift', 'HShiftDir', 'HShift_local',
         'week_shift', 'week_shift_x', 'week_shift_y', 'week_shift_z', 'T_node', 'water_level', 'pressure', 'load_value'
-      )
       union all
-      (
         select ToolNameID, EventDate, EventTime, NodeNum, NodeType, NodeDepth,
         XShift, YShift, ZShift , X, Y, Z, HShift, HShiftDir, HShift_local,
         week_shift, week_shift_x, week_shift_y, week_shift_z, T_node, water_level, pressure, load_value
         from ElabDataView
         where ToolNameID = '$tool' and created_at > '$matlab_timestamp'
-        order by EventDate, EventTime, NodeDepth
-      )
-
+        order by ToolNameID DESC, EventDate, EventTime, convert(`NodeNum`, decimal) DESC
     ) resulting_set
     into outfile '$fileelab'
     fields terminated by ',' optionally enclosed by '"' lines terminated by '\n'}