Exec('SELECT * FROM `goods_categories_old` '); while($row = $DB -> Fetch($row_query2)) { $old_cats[$row['id']] = $row; } $row_query2 = $DB->Exec('SELECT * FROM `goods_categories` '); while($row = $DB -> Fetch($row_query2)) { $new_cats[$row['id']] = $row; } foreach($old_cats as $id =>$row) { if(isset($new_cats[$id]) && $new_cats[$id]['euroled_id'] && $row['euroled_id']!=$new_cats[$id]['euroled_id']) echo $id.' '.$row['title'].' not exists
'; } ?>