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                            >[danger] 用于測試`遠程一對多關聯`的數據表

```
CREATE TABLE `city` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `city_name` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`)
) COMMENT='城市表';

CREATE TABLE `user` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT COMMENT '用戶id',
  `city_id` int(11) DEFAULT NULL,
  `username` varchar(255) NOT NULL COMMENT '用戶名',
  `nickname` varchar(255) DEFAULT NULL COMMENT '昵稱',
  `password` char(32) DEFAULT NULL COMMENT '登陸密碼',
  PRIMARY KEY (`id`) USING BTREE
)  COMMENT='用戶表';

CREATE TABLE `topic` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `user_id` int(11) DEFAULT NULL,
  `title` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`)
) COMMENT='話題表';
```
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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