navicat mysql中，引用属性组作为外键，其中一个无法引用

[abckangaroo]

引用另一个表中的属性组（主码）作为外键，一个正常，另一个无法添加外键，这是为什么？
这个问题纠结了两天了……为什么为什么为什么？？？？？？？？？

CREATE TABLE `match` (
  `matchNO` varchar(50) NOT NULL,
  `place` varchar(50) NOT NULL,
  `matchGoals` int(11) DEFAULT NULL,
   PRIMARY KEY (`matchNO`,`place`)
) ENGINE=InnoDB DEFAULT CHARSET=gb2312;

CREATE TABLE `join` (
  `teamNameJ` varchar(50) NOT NULL,
  `matchNO` varchar(50) NOT NULL,
  `place` varchar(50) NOT NULL,
  `result` varchar(50) DEFAULT NULL,
  PRIMARY KEY (`teamNameJ`,`matchNO`,`place`),
  KEY `matchNO` (`matchNO`),
  KEY `place` (`place`),
  CONSTRAINT `matchNO` FOREIGN KEY (`matchNO`) REFERENCES `match` (`matchNO`),  //正常    
  CONSTRAINT `teamNameJ` FOREIGN KEY (`teamNameJ`) REFERENCES `team` (`teamName`),//正常
  CONSTRAINT `place` FOREIGN KEY (`place`) REFERENCES `match` (`place`)   //place外键无法插入           
) ENGINE=InnoDB DEFAULT CHARSET=gb2312;

[iihero_]

可能你对主键的概念理解不够深入，子表的外键必须依赖的是主表的主键的全部。
这样写就对了：
CREATE TABLE `join` (
`teamNameJ` varchar(50) NOT NULL,
`matchNO` varchar(50) NOT NULL,
`place` varchar(50) NOT NULL,
`result` varchar(50) DEFAULT NULL,
PRIMARY KEY (`teamNameJ`,`matchNO`,`place`),
KEY `matchNO1` (`matchNO`),
KEY `place` (`place`),
CONSTRAINT `matchNO` FOREIGN KEY (`matchNO`, `place`) REFERENCES `match` (`matchNO`, `place`),
CONSTRAINT `teamNameJ` FOREIGN KEY (`teamNameJ`) REFERENCES `team` (`teamName`)
) ENGINE=InnoDB DEFAULT CHARSET=gb2312;

[rucypli]

FOREIGN KEY (matchNO,place) REFERENCES `match` (matchNO,place)

[rucypli]

KEY mp (matchNO,place),
FOREIGN KEY (matchNO,place) REFERENCES `match` (matchNO,place)

[ACMAIN_CHM]

你想实现的功能是什么？

或者改为如此
CREATE TABLE `join` (
`teamNameJ` varchar(50) NOT NULL,
`matchNO` varchar(50) NOT NULL,
`place` varchar(50) NOT NULL,
`result` varchar(50) DEFAULT NULL,
PRIMARY KEY (`teamNameJ`,`matchNO`,`place`),
KEY `matchNO` (`matchNO`),
KEY `place` (`place`),
CONSTRAINT `matchNO` FOREIGN KEY (`matchNO`) REFERENCES `match` (`matchNO`), //正常
CONSTRAINT `teamNameJ` FOREIGN KEY (`teamNameJ`) REFERENCES `team` (`teamName`),//正常
CONSTRAINT `place` FOREIGN KEY (matchNO,`place`) REFERENCES `match` (matchNO,`place`) //place外键无法插入
) ENGINE=InnoDB DEFAULT CHARSET=gb2312;

[ACMAIN_CHM]

或者改为
CREATE TABLE `match` (
`matchNO` varchar(50) NOT NULL,
`place` varchar(50) NOT NULL,
`matchGoals` int(11) DEFAULT NULL,
PRIMARY KEY (`matchNO`,`place`),
KEY (`place`),
) ENGINE=InnoDB DEFAULT CHARSET=gb2312;

[abckangaroo]

改好了~谢谢各位~

替自己总结下错误原因：
子表的外键必须依赖主表的主键的全部，应为主表的主键建立索引。

CREATE TABLE `join` (
  `teamNameJ` varchar(50) NOT NULL,
  `matchNO` varchar(50) NOT NULL,
  `place` varchar(50) NOT NULL,
  `result` varchar(50) DEFAULT NULL,
  PRIMARY KEY (`teamNameJ`,`matchNO`,`place`),
  KEY `mp` (`matchNO`,`place`),
  CONSTRAINT `mp` FOREIGN KEY (`matchNO`, `place`) REFERENCES `match` (`matchNO`, `place`),
  CONSTRAINT `teamNameJ` FOREIGN KEY (`teamNameJ`) REFERENCES `team` (`teamName`)
) ENGINE=InnoDB DEFAULT CHARSET=gb2312;

[acrunner]