Sql 无法添加或更新子行：外键约束失败（俱乐部和用户） 用户表 俱乐部桌 memberid表 刀

Keep getting error无法添加或更新子行：外键约束失败

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如果有人可以，那就太好了：）

您在

membersid

表中的键（请将该名称更改为

members

）被弄乱了。试一试

CREATE TABLE IF NOT EXISTS members 
(
  `memberId` int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY,
  `clubId` int(11) NOT NULL,
  `userId` int(11) NOT NULL,
   UNIQUE KEY (`clubId`,`userId`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1;

CREATE TABLE IF NOT EXISTS `clubs` (
  `clubId` int(11) NOT NULL AUTO_INCREMENT,
  `clubName` varchar(100) NOT NULL,
  `startTime` varchar(5) NOT NULL,
  `finishTime` varchar(5) NOT NULL,
  `date` date NOT NULL,
  PRIMARY KEY (`clubId`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 AUTO_INCREMENT=5 ;

   CREATE TABLE IF NOT EXISTS `membersid` (
  `memberId` int(11) NOT NULL AUTO_INCREMENT,
  `clubId` int(11) NOT NULL,
  `userId` int(11) NOT NULL,
  PRIMARY KEY (`memberId`,`clubId`,`userId`),
  UNIQUE KEY `memberId` (`memberId`),
  KEY `clubId` (`clubId`),
  KEY `userId` (`userId`),
  KEY `clubId_2` (`clubId`),
  KEY `clubId_3` (`clubId`),
  KEY `userId_2` (`userId`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 AUTO_INCREMENT=6 ;

String query = "INSERT INTO membersid( userId, clubId ) VALUES ( ?,? )";

CREATE TABLE IF NOT EXISTS members 
(
  `memberId` int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY,
  `clubId` int(11) NOT NULL,
  `userId` int(11) NOT NULL,
   UNIQUE KEY (`clubId`,`userId`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1;