ALTER TABLE `vn`.`country` 
    ADD COLUMN `continentFk` TINYINT(4) NULL AFTER `ibanLength`,
    ADD INDEX `continent_id_fk_idx` (`continentFk` ASC);

ALTER TABLE `vn`.`country` 
ADD CONSTRAINT `continent_id_fk`
  FOREIGN KEY (`continentFk`)
  REFERENCES `vn`.`continent` (`id`)
  ON DELETE NO ACTION
  ON UPDATE CASCADE;

UPDATE `vn`.`country` SET `continentFk` = '2' WHERE (`id` = '11');
UPDATE `vn`.`country` SET `continentFk` = '2' WHERE (`id` = '13');