MySQL错误代码1005，SQL状态HY000：无法创建表'cpis.cpis_sudent_profile'（错误号：150）

问题描述：

I need your assistance conditional! I could not determine what the problem is... I think that everything is correct, but MySQL throws an error 1005, SQL state HY000: Can't create table 'cpis.cpis_sudent_profile' (errno: 150)

DROP TABLE IF EXISTS `cpis_users`;
CREATE TABLE `cpis_users` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `username` varchar(20) NOT NULL,
  `password` varchar(128) NOT NULL,
  `email` varchar(128) NOT NULL,
  `activkey` varchar(128) NOT NULL DEFAULT '',
  `create_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `lastvisit_at` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
  `status` boolean NOT NULL DEFAULT false,
  `user_type` varchar(128) NOT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `username` (`username`),
  UNIQUE KEY `email` (`email`),
  KEY `status` (`status`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8;

DROP TABLE IF EXISTS `cpis_countries`;
CREATE TABLE `cpis_countries` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `code` varchar(3) NOT NULL,
  `title_ru` varchar(100) DEFAULT NULL,
  `title_en` varchar(100) DEFAULT NULL,
  `title_cz` varchar(100) DEFAULT NULL,
  PRIMARY KEY (`id`)
)ENGINE=InnoDB  DEFAULT CHARSET=utf8;

DROP TABLE IF EXISTS `cpis_programs`;
CREATE TABLE `cpis_programs` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `title_ru` varchar(100) DEFAULT NULL,
  `description_ru` text DEFAULT NULL,
  `title_en` varchar(100) DEFAULT NULL,
  `description_en` text DEFAULT NULL,
  `title_cz` varchar(100) DEFAULT NULL,
  `description_cz` text DEFAULT NULL,
  `publicated` boolean DEFAULT false,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8;

DROP TABLE IF EXISTS `cpis_sudent_profile`;
CREATE TABLE `cpis_sudent_profile` (
  `id` int(10) NOT NULL AUTO_INCREMENT,
  `user_id` int(11) NOT NULL,
  `fname` varchar(100) NOT NULL,
  `pname` varchar(100) NOT NULL,
  `lname` varchar(100) NOT NULL,
  `birthday` date NOT NULL,
  `citizenship` int(11) NOT NULL,
  `sex` varchar(30) NOT NULL,
  `program_id` varchar(100) NOT NULL,
  `owner` int(11) DEFAULT NULL,
  `member` int(11) DEFAULT NULL,
  `create_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
   PRIMARY KEY (`id`),
   CONSTRAINT `spfk_1` FOREIGN KEY (`user_id`) REFERENCES `cpis_users` (`id`),
   CONSTRAINT `spfk_2` FOREIGN KEY (`citizenship`) REFERENCES `cpis_countries` (`id`),
   CONSTRAINT `spfk_3` FOREIGN KEY (`program_id`) REFERENCES `cpis_programs` (`id`),
   CONSTRAINT `spfk_4` FOREIGN KEY (`owner`) REFERENCES `cpis_users` (`id`),
   CONSTRAINT `spfk_5` FOREIGN KEY (`member`) REFERENCES `cpis_users` (`id`)  
) ENGINE=InnoDB CHARSET=utf8;

答

program_id varchar(100) should be of the same data type as cpis_programs (id int(11)). By having different types of data, failure to establish the constraint. Example SQL Fiddle.

...
DROP TABLE IF EXISTS `cpis_sudent_profile`;

CREATE TABLE `cpis_sudent_profile` (
  `id` int(10) NOT NULL AUTO_INCREMENT,
  `user_id` int(11) NOT NULL,
  `fname` varchar(100) NOT NULL,
  `pname` varchar(100) NOT NULL,
  `lname` varchar(100) NOT NULL,
  `birthday` date NOT NULL,
  `citizenship` int(11) NOT NULL,
  `sex` varchar(30) NOT NULL,
  /*`program_id` varchar(100) NOT NULL,*/
  `program_id` int(11) NOT NULL,
  `owner` int(11) DEFAULT NULL,
  `member` int(11) DEFAULT NULL,
  `create_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
   PRIMARY KEY (`id`),
   CONSTRAINT `spfk_1` FOREIGN KEY (`user_id`) REFERENCES `cpis_users` (`id`),
   CONSTRAINT `spfk_2` FOREIGN KEY (`citizenship`) REFERENCES `cpis_countries` (`id`),
   CONSTRAINT `spfk_3` FOREIGN KEY (`program_id`) REFERENCES `cpis_programs` (`id`),
   CONSTRAINT `spfk_4` FOREIGN KEY (`owner`) REFERENCES `cpis_users` (`id`),
   CONSTRAINT `spfk_5` FOREIGN KEY (`member`) REFERENCES `cpis_users` (`id`)  
) ENGINE=InnoDB CHARSET=utf8;

MySQL错误代码1005，SQL状态HY000：无法创建表'cpis.cpis_sudent_profile'（错误号：150）

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