这是我的触发器: CREATE OR REPLACE TRIGGER NoMoreThanOneHorse ONNumOfHorsesForJockey NUMBER(4); SELECT COUNT(*) INTO NumOfHorsesForJockey FROM Horses
WHERE Jockey_ID= :NEW.Jockey_ID AND Horse_ID <> :NEW.Horse_ID;
corresponding handler available for {'driver_type': 'kernel_module', 'kernel_module': 'snd_hda_intel', 'jockey_handler: no corresponding handler available for {'driver_type': 'kernel_module', 'kernel_module': 'a