3 つのテーブルを作成するスキーマを次に示します。3 つ目は、次の 2 つの外部キーを持っています。MySQL が 3 番目のものを作成できない理由がわかりません。列の型が一致します。
DROP TABLE IF EXISTS `SET`;
CREATE TABLE IF NOT EXISTS `SET` (
`ID` int(11) NOT NULL AUTO_INCREMENT,
`SET_ID` int(11) DEFAULT 0,
`SET_NAME` varchar(32) NOT NULL,
`SET_RELEASE_DATE` date NOT NULL,
PRIMARY KEY (`ID`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
DROP TABLE IF EXISTS `TYPE`;
CREATE TABLE IF NOT EXISTS `TYPE` (
`ID` int(11) NOT NULL AUTO_INCREMENT,
`TYPE_ID` int(11) DEFAULT 0,
`TYPE_NAME` varchar(32) NOT NULL,
PRIMARY KEY (`ID`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
DROP TABLE IF EXISTS `CARD`;
CREATE TABLE IF NOT EXISTS `CARD` (
`ID` int(11) NOT NULL AUTO_INCREMENT,
`CARD_ID` int(11) NOT NULL DEFAULT 0,
`CARD_NAME` varchar(64) DEFAULT NULL,
`SET_ID` int(11) DEFAULT 0,
`TYPE_1` int(11) DEFAULT 0,
`TYPE_2` int(11) DEFAULT 0,
`TYPE_3` int(11) DEFAULT 0,
`TYPE_4` int(11) DEFAULT 0,
PRIMARY KEY (`ID`),
CONSTRAINT `card_idfk_1` FOREIGN KEY (`SET_ID`)
REFERENCES `SET`(`SET_ID`) ON DELETE CASCADE ON UPDATE CASCADE,
CONSTRAINT `card_t1fk_1` FOREIGN KEY (`TYPE_1`)
REFERENCES `TYPE`(`TYPE_ID`) ON DELETE CASCADE ON UPDATE CASCADE,
CONSTRAINT `card_t2fk_1` FOREIGN KEY (`TYPE_2`)
REFERENCES `TYPE`(`TYPE_ID`) ON DELETE CASCADE ON UPDATE CASCADE,
CONSTRAINT `card_t3fk_1` FOREIGN KEY (`TYPE_3`)
REFERENCES `TYPE`(`TYPE_ID`) ON DELETE CASCADE ON UPDATE CASCADE,
CONSTRAINT `card_t4fk_1` FOREIGN KEY (`TYPE_4`)
REFERENCES `TYPE`(`TYPE_ID`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=latin1;