how to write a query in prepared statement

Question

i am writing a query with inner join involved in it but having an doubt on how to write it using prepared statement here is my query

$query = "SELECT * FROM detail INNER JOIN shortlisted ON detail.id = shortlisted.shortlisted_id";
$result = mysqli_query($conn, $query);
if(mysqli_affected_rows($conn)>0){
if($row = mysqli_fetch_assoc($result))
{
//html part
}

also what should we pass in bind param if we have no particular condition to satisfy for our select query like

$query = "select * from details";
 $stmt = $conn->prepare($sql); 
   //$stmt->bind_param(); 
   $stmt->execute();
   $stmt->bind_result($full_name);

   while ($stmt->fetch()) {

//html code
}