--
-- Database: test
--

--
-- address --> city --> country
--

CREATE TABLE `country` (
  `country_id` smallint(5) unsigned NOT NULL AUTO_INCREMENT,
  `country` varchar(50) NOT NULL,
  PRIMARY KEY (`country_id`)
) ENGINE=InnoDB;

CREATE TABLE `city` (
  `city_id` smallint(5) unsigned NOT NULL AUTO_INCREMENT,
  `city` varchar(50) NOT NULL,
  `country_id` smallint(5) unsigned NOT NULL,
  PRIMARY KEY (`city_id`),
  KEY `idx_fk_country_id` (`country_id`),
  CONSTRAINT `fk_city_country` FOREIGN KEY (`country_id`) REFERENCES `country` (`country_id`) ON UPDATE CASCADE
) ENGINE=InnoDB;

CREATE TABLE `address` (
  `address_id` smallint(5) unsigned NOT NULL AUTO_INCREMENT,
  `address` varchar(50) NOT NULL,
  `city_id` smallint(5) unsigned NOT NULL,
  `postal_code` varchar(10) DEFAULT NULL,
  PRIMARY KEY (`address_id`),
  KEY `idx_fk_city_id` (`city_id`),
  CONSTRAINT `fk_address_city` FOREIGN KEY (`city_id`) REFERENCES `city` (`city_id`) ON UPDATE CASCADE
) ENGINE=InnoDB;