CREATE TABLE `grade_record_answers` (
	`id` varchar(128) PRIMARY KEY NOT NULL,
	`grade_record_id` varchar(128) NOT NULL,
	`question_id` varchar(128) NOT NULL,
	`score` decimal(6, 2) NOT NULL,
	`full_score` decimal(6, 2) NOT NULL,
	`feedback` text,
	`created_at` timestamp DEFAULT (now()) NOT NULL,
	`updated_at` timestamp DEFAULT (now()) NOT NULL,
	CONSTRAINT `gra_gr_fk` FOREIGN KEY (`grade_record_id`) REFERENCES `grade_records`(`id`) ON DELETE cascade ON UPDATE no action,
	CONSTRAINT `gra_q_fk` FOREIGN KEY (`question_id`) REFERENCES `questions`(`id`) ON DELETE cascade ON UPDATE no action
);
CREATE INDEX `grade_record_answers_record_idx` ON `grade_record_answers`(`grade_record_id`);
CREATE INDEX `grade_record_answers_question_idx` ON `grade_record_answers`(`question_id`);