CREATE TABLE IF NOT EXISTS `poll_votes` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`answer_id` int(11) ,
`poll_id` int(11) ,
`account_id` int(11) NOT NULL,
PRIMARY KEY (`id`),
FOREIGN KEY (`answer_id`) REFERENCES `poll_answer` (`id`) ON DELETE CASCADE,
FOREIGN KEY (`poll_id`)...