Código PHP:
$sql= "
(SELECT *, 'A' as tabla FROM A ORDER BY id DESC )
UNION
(SELECT *, 'B' as tabla FROM b ORDER BY id DESC )";
$respuesta= mysql_query($sql);
Código PHP:
while($data = mysql_fetch_array($respuesta2)){
echo '<a href="destino.php?id='.$data['id'].'&tabla='.$data['tabla'].' ">'.Vermas.'</a>';
Código PHP:
$sql = "SELECT * FROM ".$_GET['tabla']." where id='".$_GET['id']. ";
algo asi