MYSQL ADD CONSTRAINT ERROR

Question

我收到我的添加約束的錯誤。

我使用MySQL工作臺來創建MySQL工作臺表

消息錯誤： 錯誤代碼：1064您的SQL語法錯誤;在1號線

檢查對應於你的MySQL服務器版本正確的語法使用附近的人工「添加約束user_contact_ibfk1外鍵（user_id）參考`user_ac」難道這僅僅是我有一個版本的問題。我使用5.2.4.7

錯誤：

22:47:35 ADD CONSTRAINT user_contact_ibfk_1 FOREIGN KEY (user_id) REFERENCES user_account (user_id) ON DELETE CASCADE ON UPDATE CASCADE Error Code: 1064. 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 'ADD CONSTRAINT user_contact_ibfk_1 FOREIGN KEY (user_id) REFERENCES `user_ac' at line 1 0.000 sec

-- 
-- Table structure for table `user_contact` 
-- 
CREATE TABLE IF NOT EXISTS `user_contact` (
    `contact_id` bigint(11) NOT NULL AUTO_INCREMENT, 
    `user_id` bigint(11) NOT NULL, 
    `first_name` varchar(25) NOT NULL, 
    `last_name` varchar(25) NOT NULL, 
    `email` varchar(50) NOT NULL, 
    `email_code` varchar(32) NOT NULL, 
    `cellnumber` decimal(32,0) NOT NULL, 
    `city` varchar(25) NOT NULL, 
    `state` varchar(25) NOT NULL, 
    `country` varchar(25) NOT NULL, 
    `username` varchar(50) NOT NULL, 
    PRIMARY KEY (`contact_id`), 
    UNIQUE KEY `user_id` (`user_id`) 
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=16 ; 

-- -------------------------------------------------------- 

-- 
-- Table structure for table `user_profile` 
-- 

CREATE TABLE IF NOT EXISTS `user_profile` (
    `profile_id` bigint(11) NOT NULL AUTO_INCREMENT, 
    `user_id` bigint(11) NOT NULL, 
    `username` varchar(50) NOT NULL, 
    `about_me` text NOT NULL, 
    `work_info` varchar(255) NOT NULL, 
    `education_info` varchar(255) NOT NULL, 
    `rating` float NOT NULL, 
    `user_image` varchar(1024) NOT NULL, 
    `friend_array` text NOT NULL, 
    `online_status` tinyint(1) NOT NULL, 
    PRIMARY KEY (`profile_id`), 
    UNIQUE KEY `user_id` (`user_id`) 
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=15 ; 

-- 
-- Table structure for table `user_account` 
-- 

CREATE TABLE IF NOT EXISTS `user_account` (
    `user_id` bigint(11) NOT NULL AUTO_INCREMENT, 
    `username` varchar(50) NOT NULL, 
    `password` varchar(50) NOT NULL, 
    `active` tinyint(1) NOT NULL DEFAULT '1', 
    `type` int(11) NOT NULL, 
    `online_status` tinyint(1) NOT NULL, 
    PRIMARY KEY (`user_id`) 
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=16 ; 

-- 
-- Constraints for table `user_contact` 
-- 
ALTER TABLE `user_contact` 
    ADD CONSTRAINT `user_contact_ibfk_1` FOREIGN KEY (`user_id`) REFERENCES `user_account` (`user_id`) ON DELETE CASCADE ON UPDATE CASCADE; 

-- 
-- Constraints for table `user_profile` 
-- 

ALTER TABLE `user_profile` 
ADD CONSTRAINT `user_profile_ibfk_1` FOREIGN KEY (`user_id`) REFERENCES `user_account`  (`user_id`) ON DELETE CASCADE ON UPDATE CASCADE; 

Answer 1

可謂是一些內部錯誤與MySQL工作臺。我用phpmyadmin，它工作正常。

Answer 2

我能想到的唯一的事情就是外鍵名可能採取的，嘗試改變它。

ALTER TABLE `user_contact` 
    ADD CONSTRAINT `user_contact_ibfk_stuff` FOREIGN KEY (`user_id`) REFERENCES `user_account` (`user_id`) ON DELETE CASCADE ON UPDATE CASCADE; 

運行這個職位的結果

SELECT @@SESSION.sql_mode; 

或者直接運行這個命令：

SET SESSION SQL_MODE='NO_ENGINE_SUBSTITUTION';