I am giving you just an example to use this process. Code for show all products.
$query=mysql_query("select * from main ");
while($row=mysql_fetch_assoc($query)){
echo $row['uname'];
$idd=$row['id'];
echo '<a href="show.php?id='.$idd.'">show detail</a>';
}
Code for show.php
<?php echo $_GET['id']; ?>