CREATE TABLE `users` ( `id` int(11) NOT NULL auto_increment, `username` varchar(100) NOT NULL, `password` varchar(35) NOT NULL, `groupid` int(11) NOT NULL, `groupname` varchar(100) NOT NULL, `phone` varchar(35), `introduction` varchar(255), PRIMARY KEY (`id`), UNIQUE KEY `username` (`username`), CONSTRAINT FOREIGN KEY ('groupid', 'groupname') REFERENCES group ('id', 'groupname') ON DELETE RESTRICT ON UPDATE CASCADE )ENGINE=InnoDB DEFAULT CHARSET=utf8;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''groupid', 'groupname') REFERENCES group ('id', 'groupname') ON DELETE RESTRICT