ActiveRecord :: StatementInvalid：SQLite3 :: SQLException：near＆＃34; AUTO_INCREMENT＆＃34;

Question

我正在尝试使用SQL代码来创建大型数据库。

This是我的源文件

我尝试在seeds.rb文件中执行此代码

connection = ActiveRecord::Base.connection()
connection.execute("

CREATE TABLE `VehicleModelYear` (
  `id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
  `year` INT(4) UNSIGNED NOT NULL,
  `make` VARCHAR(50) NULL,
  `model` VARCHAR(50) NOT NULL,
  PRIMARY KEY (`id`),
  UNIQUE `U_VehicleModelYear_year_make_model` (`year`, `make`, `model`),
  INDEX `I_VehicleModelYear_year` (`year`),
  INDEX `I_VehicleModelYear_make` (`make`),
  INDEX `I_VehicleModelYear_model` (`model`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

")

它给了我错误：

ActiveRecord::StatementInvalid: SQLite3::SQLException: near "AUTO_INCREMENT": syntax error

我使用验证器检查了SQL代码，没有发现错误。

任何提示？

谢谢！