sqli how to use order by here ?

[ZERONE]

how to use order by here ?

http://metro-oa.com/product.php?catid=1&subid=&sid=&bid=&range=&pg=5

 

http://metro-oa.com/product.php?catid=1&subid=&sid=&bid=&range=&pg=@5

 

You have an _error_ in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-25, 25' at line 1