我已經創建了幾個表,其中一個是父表和三個子表。MySQL外鍵:無法添加或更新子行:外鍵約束失敗
CREATE TABLE `members` (
`memberID` int(11) NOT NULL AUTO_INCREMENT,
`username` varchar(255) NOT NULL,
`password` varchar(60) NOT NULL,
PRIMARY KEY (`memberID`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=latin1
CREATE TABLE `pets` (
`petsID` int(11) NOT NULL AUTO_INCREMENT,
`Gender` varchar(25) NOT NULL,
`Age` varchar(25) NOT NULL,
`Size` varchar(25) NOT NULL,
`memberID` int(11) NOT NULL,
PRIMARY KEY (`petsID`),
KEY `fk_pets` (`memberID`),
CONSTRAINT `pets_ibfk_1` FOREIGN KEY (`memberID`) REFERENCES `members` (`memberID`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=latin1
CREATE TABLE `owner` (
`ownerID` int(11) NOT NULL AUTO_INCREMENT,
`nameOwner` varchar(25) NOT NULL,
`ageOwner` varchar(25) NOT NULL,
`bioOwner` varchar(800) NOT NULL,
`memberID` int(11) NOT NULL,
PRIMARY KEY (`ownerID`),
KEY `fk_owner` (`memberID`),
CONSTRAINT `owner_ibfk_1` FOREIGN KEY (`memberID`) REFERENCES `members` (`memberID`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=latin1
CREATE TABLE `service` (
`serviceID` int(11) NOT NULL AUTO_INCREMENT,
`nameService` varchar(25) NOT NULL,
`webService` varchar(25) NOT NULL,
`memberID` int(11) NOT NULL,
PRIMARY KEY (`serviceID`),
KEY `fk_service` (`memberID`),
CONSTRAINT `service_ibfk_1` FOREIGN KEY (`memberID`) REFERENCES `members` (`memberID`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=latin1
測試出我的桌子後,我收到了此錯誤:
INSERT INTO owner (nameOwner, ageOwner, bioOwner) VALUES ('', '', '')
Cannot add or update a child row: a foreign key constraint fails (`DB`.`owner`, CONSTRAINT `owner_ibfk_1` FOREIGN KEY (`memberID`) REFERENCES `members` (`memberID`) ON DELETE CASCADE ON UPDATE CASCADE)
我已經嘗試過截斷我的父表,但它仍然有這個錯誤出現。我在數據庫設計的初學者,所以請解釋一下像我5.
確定 - 就像你五歲那樣:你正試圖在沒有可引用父代的子行中插入一行。 –
@HoboSapiens有一些非常錯誤的「OK - 就像你是五...」 – Ajoy
@Ajoy - 我只是在他自己的要求中強制OP。讀他最後一句話。 –