-- 创建参会者表
CREATE TABLE IF NOT EXISTS `attendees` (
  `id` INT AUTO_INCREMENT PRIMARY KEY,
  `name` VARCHAR(100) NOT NULL,
  `email` VARCHAR(100) NULL,
  `phone` VARCHAR(20) NULL,
  `company` VARCHAR(100) NULL,
  `position` VARCHAR(100) NULL,
  `checked_in` BOOLEAN NOT NULL DEFAULT FALSE,
  `checkin_time` TIMESTAMP NULL,
  `created_at` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `updated_at` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  INDEX `idx_email` (`email`),
  INDEX `idx_checked_in` (`checked_in`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;