referrals sql

ALTER TABLE `accounts` ADD `referrer` int(11) DEFAULT NULL;

CREATE TABLE IF NOT EXISTS `referrals` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `account_id` int(11) NOT NULL,
  `premium_points` int(10) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 AUTO_INCREMENT=0 ;