我已经创建了几个表,其中一个是父表和三个子表。MySQL外键:无法添加或更新子行:外键约束失败
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
测试出我的桌子后,我收到了此错误:
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)
我已经尝试过截断我的父表,但它仍然有这个错误出现。我在数据库设计的初学者,所以请解释一下像我5.
确定 - 就像你五岁那样:你正试图在没有可引用父代的子行中插入一行。 –
@HoboSapiens有一些非常错误的“OK - 就像你是五...” – Ajoy
@Ajoy - 我只是在他自己的要求中强制OP。读他最后一句话。 –