ALTER TABLE `postgresql`.`business_labour` 
DROP FOREIGN KEY `business_labour_department`;



ALTER TABLE `postgresql`.`business_labour` 
ADD INDEX `business_labour_department_idx` (`department_id` ASC);
ALTER TABLE `postgresql`.`business_labour` 
ADD CONSTRAINT `business_labour_department`
  FOREIGN KEY (`department_id`)
  REFERENCES `vn2008`.`department` (`department_id`)
  ON DELETE SET NULL
  ON UPDATE CASCADE;