$query = mysql_query("SELECT * FROM j_ads_banners  ORDER BY RAND()  LIMIT 3");

while ($row = mysql_fetch_array($query)){
  $id = $row['id'];
  $url = $row['url'];
  $image = $row['image_url'];

$today = date("d m Y");
$result = mysql_query("select * from j_stats where  DATE_FORMAT(amdate, '%d %m %Y') = '$today' and id=$id");
$num_results = mysql_num_rows($result);

if($num_results== 0 )  {

$today = date("Y-m-d");
$query = mysql_query("INSERT INTO j_stats (id, amdate, displays, clicks) VALUES ($id, '$today', 1, 0)");

} 

else {

$todays = date("Y-m-d");
$query = mysql_query("UPDATE j_stats SET displays = displays + 1 WHERE id = $id AND amdate = '$todays'"); 

}  
 
echo"<a href='$url'><img src='$image' border='0'> </a>";

}