從SQL轉儲添加外鍵失敗

Question

我試圖從SQL轉儲創建數據庫。 我寫的是這樣的：

CREATE DATABASE IF NOT EXISTS rsa_database; 

CREATE TABLE IF NOT EXISTS `keys` (
    `id` int(11) NOT NULL auto_increment, 
    `public_key` varchar(20) collate latin1_general_ci NOT NULL, 
    `private_key` varchar(30) collate latin1_general_ci NOT NULL, 
    PRIMARY KEY (`id`) 
); 

CREATE TABLE IF NOT EXISTS `user` (
    `id` int(11) NOT NULL auto_increment, 
    `firstname` varchar(20) collate latin1_general_ci NOT NULL, 
    `lastname` varchar(20) collate latin1_general_ci NOT NULL, 
    `date_of_birth` varchar(20) collate latin1_general_ci NOT NULL, 
    `zip` varchar(20) collate latin1_general_ci NOT NULL, 
    `city` varchar(20) collate latin1_general_ci NOT NULL, 
    `street` varchar(20) collate latin1_general_ci NOT NULL, 
    `number` varchar(20) collate latin1_general_ci NOT NULL, 
    `tel` varchar(20) collate latin1_general_ci NOT NULL, 
    `email` varchar(20) collate latin1_general_ci NOT NULL, 
    `k_id` int(11) NOT NULL, 
    PRIMARY KEY (`id`), 
    FOREIGN KEY (k_id) REFERENCES keys(id) 
); 

但我的MySQL服務器拋出此錯誤消息：

ERROR 1064 (42000) at line 78: 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 'keys(id)' at line 1 

我嘗試了不同的符號，看了一些文檔，但我找不出我的失敗。
謝謝！

Answer 1

由於keys是MySQL中的reserved word，需要用反引號每次引用名爲keys表時引用它：

CREATE TABLE IF NOT EXISTS `user` (
    `id` int(11) NOT NULL auto_increment, 
    `firstname` varchar(20) collate latin1_general_ci NOT NULL, 
    `lastname` varchar(20) collate latin1_general_ci NOT NULL, 
    `date_of_birth` varchar(20) collate latin1_general_ci NOT NULL, 
    `zip` varchar(20) collate latin1_general_ci NOT NULL, 
    `city` varchar(20) collate latin1_general_ci NOT NULL, 
    `street` varchar(20) collate latin1_general_ci NOT NULL, 
    `number` varchar(20) collate latin1_general_ci NOT NULL, 
    `tel` varchar(20) collate latin1_general_ci NOT NULL, 
    `email` varchar(20) collate latin1_general_ci NOT NULL, 
    `k_id` int(11) NOT NULL, 
    PRIMARY KEY (`id`), 
    FOREIGN KEY (`k_id`) REFERENCES `keys`(`id`) 
);