如何在phpmyadmin中引用多列主键

Question

ALTER TABLE `rfid_reader` ADD FOREIGN KEY (`lattitude`, 'longitude') REFERENCES `ROBS`.`location`(`lattitude`, 'longitude') ON DELETE RESTRICT ON UPDATE RESTRICT;

上述命令会导致错误。我是否必须单独反对lat-＆gt; lat和long-＆gt;长？我虽然外键总是必须引用主键。 非常感谢帮助。