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--
-- 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;
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