CREATE TABLE `surveys` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `coach_id` int(11) NOT NULL,
  `title` varchar(255) NOT NULL,
  `description` text,
  `created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `coach_id` (`coach_id`),
  CONSTRAINT `surveys_ibfk_1` FOREIGN KEY (`coach_id`) REFERENCES `coaches` (`id`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;