for your first problem, if you just want to display 2 fields, change your query to this:
$result = mysql_query('SELECT * FROM jobs LIMIT 2', $con);
for your second problem, a simple way to do it is this:
echo "<a href='" . $_SERVER['PHP_SELF'] . "?id=" . $id . "&action=delete'">Delete</a>
This link is supposed to be generated dynamically where the $id value correspond to the row you want deleted.
if your current page is link.php and the $id is 1, then when parsed it will become:
<a href='link.php?id=1&action=delete'>Delete</a>
Your link.php will have to contain this code to process the delete
if($_GET['action'] === 'delete'){
$query = 'DELETE FROM table WHERE id = $_GET['id'];
$result = mysql_query($query);
}
I'm not sure if its secure if done this way though.