$link=mysql_connect("localhost","root") or die("fail".mysql_error());
mysql_select_db('first',$link) or die('faill'.mysql_error()); 
$query_pag_data = "SELECT acc from test";

$result_pag_data = mysql_query($query_pag_data) or die('MySql Error' . mysql_error());

while ($row = mysql_fetch_array($result_pag_data)) 
{
 //在这里使用$row['acc'] 
}