ワークベンチを使用してデータベース スキーマを実装しましたが、特定のテーブルで外部キーを使用するとこのエラーが発生します。
1215 - 外部キー制約を追加できません
SQL クエリ:
CREATE TABLE IF NOT EXISTS `Gam3ty`.`Frequently_Used_Location` (
`idFrequently_Used_Location` INT NOT NULL,
`User_idUser` INT NOT NULL,
`User_College_idCollege` INT NOT NULL,
PRIMARY KEY (`idFrequently_Used_Location`,`User_idUser`,`User_College_idCollege`),
INDEX `fk_Frequently_Used_Location_User1_idx` (`User_idUser` ASC,`User_College_idCollege` ASC),
CONSTRAINT `fk_Frequently_Used_Location_User1`
FOREIGN KEY (`User_idUser` , `User_College_idCollege`)
REFERENCES `Gam3ty`.`User` (`idUser` , `College_idCollege`)
私のSQL：
CREATE SCHEMA IF NOT EXISTS `Gam3ty` DEFAULT CHARACTER SET utf8 ;
USE `Gam3ty` ;
-- -----------------------------------------------------
-- Table `Gam3ty`.`Frequently_Used_Location`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `Gam3ty`.`Frequently_Used_Location` (
`idFrequently_Used_Location` INT NOT NULL,
`User_idUser` INT NOT NULL,
`User_College_idCollege` INT NOT NULL,
PRIMARY KEY (`idFrequently_Used_Location`, `User_idUser`, `User_College_idCollege`),
INDEX `fk_Frequently_Used_Location_User1_idx` (`User_idUser` ASC, `User_College_idCollege` ASC),
CONSTRAINT `fk_Frequently_Used_Location_User1`
FOREIGN KEY (`User_idUser` , `User_College_idCollege`)
REFERENCES `Gam3ty`.`User` (`idUser` , `College_idCollege`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `Gam3ty`.`Location`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `Gam3ty`.`Location` (
`idLocation` INT NOT NULL,
`Frequently_Used_Location_idFrequently_Used_Location` INT NOT NULL,
`Frequently_Used_Location_User_idUser` INT NOT NULL,
`Frequently_Used_Location_User_College_idCollege` INT NOT NULL,
`type` VARCHAR(45) NULL,
PRIMARY KEY (`idLocation`),
INDEX `fk_Location_Frequently_Used_Location1_idx` (`Frequently_Used_Location_idFrequently_Used_Location` ASC, `Frequently_Used_Location_User_idUser` ASC, `Frequently_Used_Location_User_College_idCollege` ASC),
CONSTRAINT `fk_Location_Frequently_Used_Location1`
FOREIGN KEY (`Frequently_Used_Location_idFrequently_Used_Location` , `Frequently_Used_Location_User_idUser` , `Frequently_Used_Location_User_College_idCollege`)
REFERENCES `Gam3ty`.`Frequently_Used_Location` (`idFrequently_Used_Location`, `User_idUser` , `User_College_idCollege`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `Gam3ty`.`University`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `Gam3ty`.`University` (
`idUniversity` INT NOT NULL,
`Location_idLocation` INT NOT NULL,
`Info` VARCHAR(45) NULL,
PRIMARY KEY (`idUniversity`, `Location_idLocation`),
INDEX `fk_University_Location1_idx` (`Location_idLocation` ASC),
CONSTRAINT `fk_University_Location1`
FOREIGN KEY (`Location_idLocation`)
REFERENCES `Gam3ty`.`Location` (`idLocation`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `Gam3ty`.`College`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `Gam3ty`.`College` (
`idCollege` INT NOT NULL,
`University_idUniversity` INT NOT NULL,
`Location_idLocation` INT NOT NULL,
`Info` VARCHAR(45) NULL,
`Staff` VARCHAR(45) NULL,
`Department` VARCHAR(45) NULL,
PRIMARY KEY (`idCollege`, `University_idUniversity`, `Location_idLocation`),
INDEX `fk_College_University1_idx` (`University_idUniversity` ASC),
INDEX `fk_College_Location1_idx` (`Location_idLocation` ASC),
CONSTRAINT `fk_College_University1`
FOREIGN KEY (`University_idUniversity`)
REFERENCES `Gam3ty`.`University` (`idUniversity`)
ON DELETE NO ACTION
ON UPDATE NO ACTION,
CONSTRAINT `fk_College_Location1`
FOREIGN KEY (`Location_idLocation`)
REFERENCES `Gam3ty`.`Location` (`idLocation`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `Gam3ty`.`User`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `Gam3ty`.`User` (
`idUser` INT NOT NULL,
`College_idCollege` INT NOT NULL,
`UserName` VARCHAR(45) NOT NULL,
`Password` VARCHAR(45) NOT NULL,
`E-mail` VARCHAR(45) NOT NULL,
`Social_media_accounts` VARCHAR(45) NULL,
`Gender` VARCHAR(45) NOT NULL,
`Job` VARCHAR(45) NOT NULL,
`Tel-num` BIGINT(11) NULL,
`Adress` VARCHAR(45) NULL,
PRIMARY KEY (`idUser`, `College_idCollege`, `UserName`),
INDEX `fk_User_College_idx` (`College_idCollege` ASC),
CONSTRAINT `fk_User_College`
FOREIGN KEY (`College_idCollege`)
REFERENCES `Gam3ty`.`College` (`idCollege`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
データ型を確認しましたが、それらはすべて同じです。また、すべての外部キーは元のテーブルの主キーです。