CREATE TABLE IF NOT EXISTS `quotation_table` (
  `id` bigint(20) NOT NULL,
  `bidData` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  `symbol` varchar(15) COLLATE utf8_unicode_ci NOT NULL,
  `bid` double NOT NULL,
  `ask` double NOT NULL,
  `avg` double NOT NULL
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

	$statement = $link->prepare("SELECT * FROM `quotation_table` WHERE `bidData` >= date_sub(now(), INTERVAL 1 MINUTE)");
	$statement->execute();
	$row = $statement->fetchAll();
	
	print_r($row