I did something similar and used an auto_increment field as an id number. When I wanted to display the latest x number of entries, I would sort by newsid desc.
On the link to the news article itself, you could do something like:
<a href="page.php?newsid=4">Click here to view this entry</a>
And then just use the $newsid variable passed to the new page (page.php) in a select:
$query = "select * from TABLENAME where newsid = '".$newsid."'";
$result = mysql_query($query);