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試圖做一些數據建模。我試圖在我的Games，Matches和Turns表中跟蹤兩個機器人。這些機器人列在機器人表中，並且在三個提到的表格中，foriegn密鑰需要出現兩次（每個機器人一次）。MySQL引用兩次相同的外鍵
這個數據庫是用來記錄兩個AI的同臺競技，結果對方
不知道這是模型很好的做法，但試圖實現這個當我errorno：150不理解如何解決這個問題。任何幫助和建議，將不勝感激。下面列出的SQL代碼。
SET @[email protected]@UNIQUE_CHECKS, UNIQUE_CHECKS=0;
SET @[email protected]@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0;
SET @[email protected]@SQL_MODE, SQL_MODE='TRADITIONAL,ALLOW_INVALID_DATES';
CREATE SCHEMA IF NOT EXISTS `battleship` DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci ;
USE `battleship` ;
-- -----------------------------------------------------
-- Table `battleship`.`Security`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `battleship`.`Security` ;
CREATE TABLE IF NOT EXISTS `battleship`.`Security` (
`SecurityID` INT NOT NULL ,
`Level` VARCHAR(45) NULL ,
`Description` VARCHAR(200) NULL ,
PRIMARY KEY (`SecurityID`))
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `battleship`.`Users`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `battleship`.`Users` ;
CREATE TABLE IF NOT EXISTS `battleship`.`Users` (
`UserID` INT NOT NULL ,
`Username` VARCHAR(45) NULL ,
`First_name` VARCHAR(45) NULL ,
`Last_name` VARCHAR(45) NULL ,
`Email` VARCHAR(45) NULL ,
`Student Number` INT NULL ,
`Enabled` BINARY NULL ,
`SecurityID` INT NOT NULL ,
PRIMARY KEY (`UserID`) ,
INDEX `fk_Users_Security_idx` (`SecurityID` ASC) ,
CONSTRAINT `fk_Users_Security`
FOREIGN KEY (`SecurityID`)
REFERENCES `battleship`.`Security` (`SecurityID`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `battleship`.`News`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `battleship`.`News` ;
CREATE TABLE IF NOT EXISTS `battleship`.`News` (
`EventID` INT NOT NULL ,
`Event_Name` VARCHAR(45) NULL ,
`Event_Date` DATETIME NULL ,
`Event_Description` VARCHAR(45) NULL ,
`UserID` INT NOT NULL ,
PRIMARY KEY (`EventID`, `UserID`) ,
INDEX `fk_News_Users1_idx` (`UserID` ASC) ,
CONSTRAINT `fk_News_Users1`
FOREIGN KEY (`UserID`)
REFERENCES `battleship`.`Users` (`UserID`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `battleship`.`Bots`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `battleship`.`Bots` ;
CREATE TABLE IF NOT EXISTS `battleship`.`Bots` (
`BotID` INT NOT NULL ,
`Name` VARCHAR(45) NULL ,
`UserID` INT NOT NULL ,
`Revision` INT NULL ,
`SubmissionDate` DATETIME NULL ,
`Approved` BINARY NULL ,
PRIMARY KEY (`BotID`, `UserID`) ,
INDEX `fk_Bots_Users1_idx` (`UserID` ASC) ,
CONSTRAINT `fk_Bots_Users1`
FOREIGN KEY (`UserID`)
REFERENCES `battleship`.`Users` (`UserID`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `battleship`.`Competitions`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `battleship`.`Competitions` ;
CREATE TABLE IF NOT EXISTS `battleship`.`Competitions` (
`CompetitionsID` INT NOT NULL ,
`CompetitionName` VARCHAR(45) NULL ,
`Description` VARCHAR(45) NULL ,
`Date` VARCHAR(45) NULL ,
PRIMARY KEY (`CompetitionsID`))
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `battleship`.`Matches`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `battleship`.`Matches` ;
CREATE TABLE IF NOT EXISTS `battleship`.`Matches` (
`MatchID` INT NOT NULL ,
`Winner` VARCHAR(45) NULL ,
`Bots_BotID1` INT NOT NULL ,
`Bots_BotID2` INT NOT NULL ,
`CompetitionsID` INT NOT NULL ,
PRIMARY KEY (`MatchID`) ,
INDEX `fk_Matches_Bots1_idx` (`Bots_BotID1` ASC, `Bots_BotID2` ASC) ,
INDEX `fk_Matches_Competitions1_idx` (`CompetitionsID` ASC) ,
CONSTRAINT `fk_Matches_Bots1`
FOREIGN KEY (`Bots_BotID1` , `Bots_BotID2`)
REFERENCES `battleship`.`Bots` (`BotID` , `BotID`)
ON DELETE NO ACTION
ON UPDATE NO ACTION,
CONSTRAINT `fk_Matches_Competitions1`
FOREIGN KEY (`CompetitionsID`)
REFERENCES `battleship`.`Competitions` (`CompetitionsID`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `battleship`.`Entrants`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `battleship`.`Entrants` ;
CREATE TABLE IF NOT EXISTS `battleship`.`Entrants` (
`EntryID` INT NOT NULL ,
`Bots_BotID` INT NOT NULL ,
`Competitions_CompetitionsID` INT NOT NULL ,
PRIMARY KEY (`EntryID`) ,
INDEX `fk_Entrants_Bots1_idx` (`Bots_BotID` ASC) ,
INDEX `fk_Entrants_Competitions1_idx` (`Competitions_CompetitionsID` ASC) ,
CONSTRAINT `fk_Entrants_Bots1`
FOREIGN KEY (`Bots_BotID`)
REFERENCES `battleship`.`Bots` (`BotID`)
ON DELETE NO ACTION
ON UPDATE NO ACTION,
CONSTRAINT `fk_Entrants_Competitions1`
FOREIGN KEY (`Competitions_CompetitionsID`)
REFERENCES `battleship`.`Competitions` (`CompetitionsID`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `battleship`.`Games`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `battleship`.`Games` ;
CREATE TABLE IF NOT EXISTS `battleship`.`Games` (
`GameID` INT NOT NULL ,
`Matches_MatchID` INT NOT NULL ,
`Bots_BotID1` INT NOT NULL ,
`Bots_BotID2` INT NOT NULL ,
`Winner` VARCHAR(45) NULL ,
PRIMARY KEY (`GameID`) ,
INDEX `fk_Games_Matches1_idx` (`Matches_MatchID` ASC) ,
INDEX `fk_Games_Bots1_idx` (`Bots_BotID1` ASC, `Bots_BotID2` ASC) ,
CONSTRAINT `fk_Games_Matches1`
FOREIGN KEY (`Matches_MatchID`)
REFERENCES `battleship`.`Matches` (`MatchID`)
ON DELETE NO ACTION
ON UPDATE NO ACTION,
CONSTRAINT `fk_Games_Bots1`
FOREIGN KEY (`Bots_BotID1` , `Bots_BotID2`)
REFERENCES `battleship`.`Bots` (`BotID` , `BotID`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `battleship`.`Turns`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `battleship`.`Turns` ;
CREATE TABLE IF NOT EXISTS `battleship`.`Turns` (
`TurnID` INT NOT NULL ,
`Bots_BotID1` INT NOT NULL ,
`Bots_BotID2` INT NOT NULL ,
`Bot1Move` VARCHAR(45) NULL ,
`Bot2Move` VARCHAR(45) NULL ,
`ThinkingTime` VARCHAR(45) NULL ,
`Turnscol` VARCHAR(45) NULL ,
`Games_GameID` INT NOT NULL ,
PRIMARY KEY (`TurnID`) ,
INDEX `fk_Turns_Bots1_idx` (`Bots_BotID1` ASC, `Bots_BotID2` ASC) ,
INDEX `fk_Turns_Games1_idx` (`Games_GameID` ASC) ,
CONSTRAINT `fk_Turns_Bots1`
FOREIGN KEY (`Bots_BotID1` , `Bots_BotID2`)
REFERENCES `battleship`.`Bots` (`BotID` , `BotID`)
ON DELETE NO ACTION
ON UPDATE NO ACTION,
CONSTRAINT `fk_Turns_Games1`
FOREIGN KEY (`Games_GameID`)
REFERENCES `battleship`.`Games` (`GameID`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
USE `battleship` ;
SET [email protected]_SQL_MODE;
SET [email protected]_FOREIGN_KEY_CHECKS;
SET [email protected]_UNIQUE_CHECKS;
