CREATE TABLE IF NOT EXISTS `leave_requests` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `student_id` int(11) NOT NULL,
  `leave_type` varchar(255) NOT NULL,
  `start_date` date NOT NULL,
  `end_date` date NOT NULL,
  `reason` text NOT NULL,
  `attachment_path` varchar(255) DEFAULT NULL,
  `status` varchar(255) NOT NULL DEFAULT 'pending',
  `created_at` timestamp NOT NULL DEFAULT current_timestamp(),
  PRIMARY KEY (`id`),
  KEY `student_id` (`student_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;