title1 | title2 |type  
-------+--------+----
qwe1   | qwe2   | 3  
asd1   | asd2   | 7

在PHP中的这个表

title | type  
------+-----
asd1  | 7  
asd2  | 7  
qwe1  | 3  
qwe1  | 3

但我不知道如何正确地按第一列排序PHP表.
有任何想法吗？
提前致谢.

(这是我目前使用的代码)

$sql = "SELECT * FROM table ORDER BY title1,title2";   
$pager = new PS_Pagination( $dbh,$sql,3,4,null );//pagination class
$rs = $pager->paginate(); 

while ($row = $rs->fetch(PDO::FETCH_ASSOC)){
    echo "<tr>";
    echo "<td>{$row['title1']}</td>";
    echo "<td>{$row['type']}</td>";
    echo "</tr>";

    echo "<tr>";
    echo "<td>{$row['title2']}</td>";
    echo "<td>{$row['type']}</td>";
    echo "</tr>";
}       

echo "</table>";

SELECT `title1` AS `title`,`type`
FROM `table`
UNION
SELECT `title2` AS `title`,`type`
FROM `table`
ORDER BY `title` ASC

+-------+------+
| TITLE | TYPE |
+-------+------+
|  asd1 |    7 |
|  asd2 |    7 |
|  qwe1 |    3 |
|  qwe2 |    3 |
+-------+------+