mysql-基于图表构建代码_Mysql

mysql-基于图表构建代码

mysql

mysql-基于图表构建代码,mysql,Mysql,我正试图构建一个数据库，但我对MySql一无所知。以下是我的目标：以下是我到目前为止编写的代码（如图所示，表是按从左到右的顺序创建的）图书与类型、图书与等级之间的关系是什么？图书与等级之间的关系是1:n，type和grade是可选的。这很容易用MySQL工作台创建这应该做到： -- ----------------------------------------------------- -- Table `type` -- -------------------------------

我正试图构建一个数据库，但我对MySql一无所知。以下是我的目标：

以下是我到目前为止编写的代码（如图所示，表是按从左到右的顺序创建的）

图书与类型、图书与等级之间的关系是什么？

图书与等级之间的关系是1:n，

type

和

grade

是可选的。这很容易用MySQL工作台创建

这应该做到：

-- -----------------------------------------------------
-- 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;

我在这里只看到一个问题，那就是表之间的关系。Book->Type在表'Book'中为'Type\u id'，在表'Type'中为'id'。Book->Grade是表'Book'='id'中的'Grade\u id'。代码是我的出发点，我相当确信其中的一些部分是错误的，有些东西甚至没有编码-这就是问题1。谢谢，谢谢。contraint做什么？基本上是保持ID同步吗（即：添加一本新书也会通过FK为相关表创建记录）？@user1937588约束的任务是维护数据和关系的完整性。添加新书不会在相关表中创建记录。如果定义了约束，则这些约束可以限制/级联

更新

或

删除

操作。这是一个很好的工作原理的来源。

-- -----------------------------------------------------
-- 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;