Question

我的SQL脚本首先说它没有连接，当我打开它时，所以我可以通过转到Query-> Reconnect to server来连接它。然后，我尝试执行仅创建前两个表的SQL脚本，并遇到错误代码1064，并且错误在“可见索引”行中。我不知道这是什么意思，因为我完全不熟悉SQL，有人可以帮忙吗？

错误代码：1064。您的SQL语法有错误；检查与您的MariaDB服务器版本相对应的手册，以在第9行的'INDEX userId_idx（userId ASC）VISBLE，CONSTRAINT gameId FOREIGN'附近使用正确的语法

-MySQL Workbench生成的MySQL脚本 -2019年1月2日星期三02:21:44 -型号：新型号版本：1.0 -MySQL Workbench正向工程

SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0;
SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0;
SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';

-- -----------------------------------------------------
-- Schema mydb
-- -----------------------------------------------------
-- -----------------------------------------------------
-- Schema game_review
-- -----------------------------------------------------

-- -----------------------------------------------------
-- Schema game_review
-- -----------------------------------------------------
CREATE SCHEMA IF NOT EXISTS `game_review` DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci ;
USE `game_review` ;

-- -----------------------------------------------------
-- Table `game_review`.`games`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `game_review`.`games` (
  `game_Id` INT NOT NULL AUTO_INCREMENT,
  `title` VARCHAR(255) NOT NULL,
  `tags` VARCHAR(60) NOT NULL,
  `systemReq` VARCHAR(255) NOT NULL,
  `developer` VARCHAR(45) NOT NULL,
  `publisher` VARCHAR(45) NOT NULL,
  `trailer` VARCHAR(45) NULL,
  `about` VARCHAR(255) NULL,
  `platform` VARCHAR(45) NOT NULL,
  `categories` VARCHAR(45) NOT NULL,
  `description` VARCHAR(45) NOT NULL,
  `releaseDate` DATETIME NOT NULL,
  PRIMARY KEY (`game_Id`))
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `game_review`.`users`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `game_review`.`users` (
  `user_Id` INT NOT NULL AUTO_INCREMENT,
  `username` VARCHAR(45) NOT NULL,
  `password` VARCHAR(45) NOT NULL,
  `email` VARCHAR(45) NOT NULL,
  PRIMARY KEY (`user_Id`))
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `game_review`.`reviews`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `game_review`.`reviews` (
  `review_Id` INT NOT NULL AUTO_INCREMENT,
  `gameId` INT NOT NULL,
  `userId` INT NOT NULL,
  `review` TEXT(1024) NOT NULL,
  `rating` INT NULL,
  `dateposted` DATETIME NULL,
  PRIMARY KEY (`review_Id`),
  INDEX `gameId_idx` (`gameId` ASC) VISIBLE,
  INDEX `userId_idx` (`userId` ASC) VISIBLE,
  CONSTRAINT `gameId`
    FOREIGN KEY (`gameId`)
    REFERENCES `game_review`.`games` (`game_Id`)
    ON DELETE CASCADE
    ON UPDATE NO ACTION,
  CONSTRAINT `userId`
    FOREIGN KEY (`userId`)
    REFERENCES `game_review`.`users` (`user_Id`)
    ON DELETE CASCADE
    ON UPDATE NO ACTION)
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `game_review`.`favourites`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `game_review`.`favourites` (
  `favourites_Id` INT NOT NULL AUTO_INCREMENT,
  `gameId` INT NOT NULL,
  `userId` INT NOT NULL,
  PRIMARY KEY (`favourites_Id`),
  INDEX `gameId_idx` (`gameId` ASC) VISIBLE,
  INDEX `userId_idx` (`userId` ASC) VISIBLE,
  CONSTRAINT `gameId`
    FOREIGN KEY (`gameId`)
    REFERENCES `game_review`.`games` (`game_Id`)
    ON DELETE CASCADE
    ON UPDATE NO ACTION,
  CONSTRAINT `userId`
    FOREIGN KEY (`userId`)
    REFERENCES `game_review`.`users` (`user_Id`)
    ON DELETE CASCADE
    ON UPDATE NO ACTION)
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `game_review`.`forum`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `game_review`.`forum` (
  `forum_Id` INT NOT NULL AUTO_INCREMENT,
  `gameId` INT NOT NULL,
  `userId` INT NOT NULL,
  `topic` VARCHAR(45) NOT NULL,
  `views` INT NOT NULL,
  `likes` INT NOT NULL,
  `comment` TEXT(300) NULL,
  `totalComments` INT NULL,
  `dateposted` DATETIME NOT NULL,
  PRIMARY KEY (`forum_Id`),
  INDEX `gameId_idx` (`gameId` ASC) VISIBLE,
  INDEX `userId_idx` (`userId` ASC) VISIBLE,
  CONSTRAINT `gameId`
    FOREIGN KEY (`gameId`)
    REFERENCES `game_review`.`games` (`game_Id`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `userId`
    FOREIGN KEY (`userId`)
    REFERENCES `game_review`.`users` (`user_Id`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `game_review`.`game cart`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `game_review`.`game cart` (
  `cart_Id` INT NOT NULL AUTO_INCREMENT,
  `gameId` INT NOT NULL,
  `quantity` INT NULL,
  PRIMARY KEY (`cart_Id`),
  INDEX `gameId_idx` (`gameId` ASC) VISIBLE,
  CONSTRAINT `gameId`
    FOREIGN KEY (`gameId`)
    REFERENCES `game_review`.`games` (`game_Id`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;


SET SQL_MODE=@OLD_SQL_MODE;
SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;
SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS;

Answer 1

您的索引声明不正确：VISIBLE无法识别语法。另外，ASC的提及是多余的，因为它对应于默认值。

替换：

...
INDEX `gameId_idx` (`gameId` ASC) VISIBLE,
INDEX `userId_idx` (`userId` ASC) VISIBLE,
...

使用：

...
INDEX `reviews_gameId_idx` (`gameId`),
INDEX `reviews_userId_idx` (`userId`),
...

有关更多信息，请参见the mysql CREATE INDEX docs。

还请记住，在除mysql之外的大多数RDBMS中，索引名称在整个数据库模式中都是全局的，因此请确保不要两次使用相同的索引名称（我可以看到至少索引gameId_idx两次声明。一种解决方案是在索引名称之前添加它所属的表，

不同表之间的外键名称也必须是唯一的（您有重复项，如game_Id）。

最后我还注意到您的表名中有一个空格（game cart）：这不是一个好习惯，应该避免。

SQL脚本无法创建某些表

1 个答案: