title: For the method PDO::lastInsertId(), what do they mean by the argument "sequence name"? (PHP - PDO)
body: <p>I am trying to use PDO's lastInsertId method, but the documentation states that for some rdbms I need a sequence name as an argument. Only being familiar with mysql, I am not quite sure what a sequence name is. Do they mean the name of the column that contains the auto-increment id? Here is the documentation for the method:</p>
  
  <p><a href="http://php.net/manual/en/pdo.lastinsertid.php" rel="noreferrer">http://php.net/manual/en/pdo.lastinsertid.php</a></p>
  
  <p>Any information on this would be greatly appreciated. Thanks.</p>