text: CREATE TABLE `employee`
  	(`id` VARCHAR(32) NOT NULL,
  	`name` VARCHAR(32) NOT NULL,
  	`office` VARCHAR(32) NOT NULL,
  	`age` INTEGER NOT NULL,
  	PRIMARY KEY(`id`));
  CREATE TABLE `book`
  	(`id` VARCHAR(32) NOT NULL,
  	`name` VARCHAR(32) NOT NULL,
  	`author` VARCHAR(32) NOT NULL,
  	`publisher` VARCHAR(32) NOT NULL,
  	PRIMARY KEY(`id`));
  CREATE TABLE `record` 
  	(book_id VARCHAR(32) NOT NULL,
  	employee_id VARCHAR(32) NOT NULL,
  	`time` DATE NOT NULL,
  	FOREIGN KEY (book_id) REFERENCES book (`id`),
  	FOREIGN KEY (employee_id) REFERENCES employee (`id`));
  