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我正在尝试构建一个数据库，但我对 MySql 一无所知。以下是我的目标： http ://snag.gy/eryLf.jpg

这是我到目前为止编写的代码（如图所示，表格是按从左到右的顺序创建的）

    CREATE TABLE person (
  id INT(11) PRIMARY KEY AUTO_INCREMENT,
  fname VARCHAR(64),
  lname VARCHAR(64)
) ENGINE = InnoDB;

CREATE TABLE bookauthor (
  book_id INT(11),
  author_id INT(11),
  FOREIGN KEY (author_id) REFERENCES person (id) ON UPDATE CASCADE,
  FOREIGN KEY (book_id) REFERENCES book (id) ON UPDATE CASCADE
) ENGINE = InnoDB;

CREATE TABLE bookpublisher (
  book_id INT(11),
  publisher_id INT(11),
  FOREIGN KEY (book_id) REFERENCES book (id) ON UPDATE CASCADE,
  FOREIGN KEY (publisher_id) REFERENCES publisher(id) ON UPDATE CASCADE
) ENGINE = InnoDB;

CREATE TABLE publisher (
  id INT(11) PRIMARY KEY AUTO_INCREMENT,
  name VARCHAR(64)
) ENGINE = InnoDB;

CREATE TABLE bookillustrator (
  book_id INT(11),
  illustrator_id INT(11),
  FOREIGN KEY (book_id) REFERENCES book(id) ON UPDATE CASCADE,
  FOREIGN KEY (illustrator_id) REFERENCES person(id) ON UPDATE CASCADE
) ENGINE = InnoDB;

CREATE TABLE book (
  id INT(11) PRIMARY KEY AUTO_INCREMENT,
  title VARCHAR(256),
  type_id INT(11),
  publication_date DATE,
  value DECIMAL(10,2),
  price DECIMAL(10,2),
  notes TEXT,
  signed TINYINT(1),
  grade_id INT(10),
  bagged TINYINT(1)
) ENGINE = InnoDB;

CREATE TABLE booktag (
  book_id INT(11),
  tag_id INT(11),
  FOREIGN KEY (book_id) REFERENCES book(id) ON UPDATE CASCADE,
  FOREIGN KEY(tag_id) REFERENCES tag(id) ON UPDATE CASCADE
) ENGINE = InnoDB;

CREATE TABLE tag (
  id INT(11) PRIMARY KEY AUTO_INCREMENT,
  value VARCHAR(64)
) ENGINE = InnoDB;

CREATE TABLE type (
  id INT(11) PRIMARY KEY AUTO_INCREMENT,
  name VARCHAR(64)
) ENGINE = InnoDB;

CREATE TABLE grade (
  id INT(11) AUTO_INCREMENT PRIMARY KEY,
  name VARCHAR(256)
) ENGINE = InnoDB;

书与打字、书与等级之间的关系又是怎样的呢？

4

1 回答 1

1

和关系是 1:n，其中book->type和是可选的。这很容易用 MySQL Workbench 创建。book->gradetypegrade

这应该这样做：

-- -----------------------------------------------------
-- Table `type`
-- -----------------------------------------------------
CREATE  TABLE IF NOT EXISTS `type` (
  `id` INT(10) NOT NULL ,
  `name` VARCHAR(256) NULL ,
  PRIMARY KEY (`id`) )
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `grade`
-- -----------------------------------------------------
CREATE  TABLE IF NOT EXISTS `grade` (
  `id` INT(10) NOT NULL ,
  `name` VARCHAR(256) NULL ,
  PRIMARY KEY (`id`) )
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `book`
-- -----------------------------------------------------
CREATE  TABLE IF NOT EXISTS `book` (
  `id` INT(10) NOT NULL ,
  `title` VARCHAR(256) NOT NULL ,
  `type_id` INT(10) NULL ,
  `publication_date` DATE NULL ,
  `value` DECIMAL(10,2) NULL ,
  `price` DECIMAL(10,2) NULL ,
  `notes` TEXT NULL ,
  `signed` TINYINT(1) NULL ,
  `grade_id` INT(10) NULL ,
  `bagged` TINYINT(1) NULL ,
  PRIMARY KEY (`id`) ,
  INDEX `fk_book_grade` (`grade_id` ASC) ,
  INDEX `fk_book_type1` (`type_id` ASC) ,
  CONSTRAINT `fk_book_grade`
    FOREIGN KEY (`grade_id` )
    REFERENCES `grade` (`id` )
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `fk_book_type1`
    FOREIGN KEY (`type_id` )
    REFERENCES `type` (`id` )
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `tag`
-- -----------------------------------------------------
CREATE  TABLE IF NOT EXISTS `tag` (
  `id` INT(10) NOT NULL ,
  `value` VARCHAR(64) NOT NULL ,
  PRIMARY KEY (`id`) )
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `booktag`
-- -----------------------------------------------------
CREATE  TABLE IF NOT EXISTS `booktag` (
  `book_id` INT(10) NOT NULL ,
  `tag_id` INT(10) NOT NULL ,
  INDEX `fk_booktag_book1` (`book_id` ASC) ,
  INDEX `fk_booktag_tag1` (`tag_id` ASC) ,
  PRIMARY KEY (`book_id`, `tag_id`) ,
  CONSTRAINT `fk_booktag_book1`
    FOREIGN KEY (`book_id` )
    REFERENCES `book` (`id` )
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `fk_booktag_tag1`
    FOREIGN KEY (`tag_id` )
    REFERENCES `tag` (`id` )
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `person`
-- -----------------------------------------------------
CREATE  TABLE IF NOT EXISTS `person` (
  `id` INT(10) NOT NULL ,
  `fname` VARCHAR(64) NOT NULL ,
  `lname` VARCHAR(64) NOT NULL ,
  PRIMARY KEY (`id`) )
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `bookillustrator`
-- -----------------------------------------------------
CREATE  TABLE IF NOT EXISTS `bookillustrator` (
  `book_id` INT(10) NOT NULL ,
  `person_id` INT(10) NOT NULL ,
  INDEX `fk_bookillustrator_person1` (`person_id` ASC) ,
  INDEX `fk_bookillustrator_book1` (`book_id` ASC) ,
  PRIMARY KEY (`book_id`, `person_id`) ,
  CONSTRAINT `fk_bookillustrator_person1`
    FOREIGN KEY (`person_id` )
    REFERENCES `person` (`id` )
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `fk_bookillustrator_book1`
    FOREIGN KEY (`book_id` )
    REFERENCES `book` (`id` )
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `bookauthor`
-- -----------------------------------------------------
CREATE  TABLE IF NOT EXISTS `bookauthor` (
  `book_id` INT(10) NOT NULL ,
  `person_id` INT(10) NOT NULL ,
  INDEX `fk_bookauthor_person1` (`person_id` ASC) ,
  INDEX `fk_bookauthor_book1` (`book_id` ASC) ,
  PRIMARY KEY (`book_id`, `person_id`) ,
  CONSTRAINT `fk_bookauthor_person1`
    FOREIGN KEY (`person_id` )
    REFERENCES `person` (`id` )
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `fk_bookauthor_book1`
    FOREIGN KEY (`book_id` )
    REFERENCES `book` (`id` )
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `publisher`
-- -----------------------------------------------------
CREATE  TABLE IF NOT EXISTS `publisher` (
  `id` INT(10) NOT NULL ,
  `name` VARCHAR(64) NOT NULL ,
  PRIMARY KEY (`id`) )
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `bookpublisher`
-- -----------------------------------------------------
CREATE  TABLE IF NOT EXISTS `bookpublisher` (
  `book_id` INT(10) NOT NULL ,
  `publisher_id` INT(10) NOT NULL ,
  INDEX `fk_bookpublisher_book1` (`book_id` ASC) ,
  INDEX `fk_bookpublisher_publisher1` (`publisher_id` ASC) ,
  PRIMARY KEY (`book_id`, `publisher_id`) ,
  CONSTRAINT `fk_bookpublisher_book1`
    FOREIGN KEY (`book_id` )
    REFERENCES `book` (`id` )
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `fk_bookpublisher_publisher1`
    FOREIGN KEY (`publisher_id` )
    REFERENCES `publisher` (`id` )
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;

SQL小提琴

于 2013-02-08T23:02:04.587 回答