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$counter++;
                $hashData{$counter}{'id'} = $hold_col_val1;
...
                $hashData{$counter}{'col5'} = $total_call_count;
                $hashData{$counter}{'col6'} = $total_error_count;
                push @output, \%hashData;

$sth->execute();
while (my $row = $sth->fetchrow_hashref ){
...
                push @output, \%hashData;
                #print $hashData[$counter]{'id'}." ".$hashData[$counte
+r]{'col6'}."\n";
        }