从 SQL 转储添加外键失败

Question

我正在尝试从 SQL 转储创建数据库。我是这样写的：

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 服务器抛出此错误消息：

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

我尝试了不同的符号并阅读了一些文档，但我无法弄清楚我的失败。
谢谢！

Answer 1

由于 keys 是 MySQL 中的 reserved word，因此每次引用名为 keys 的 table 时都需要用反引号引用它：

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`)
);

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