插入语法为
INSERT INTO table (columns_list) VALUES (values_list)
因此您的插入内容应如下所示（我不是MySQL专家，但您可以适合查询）：
INSERT INTO data_tracking (`data_id` , `field` , `old_value` , `new_value` , `modified` ) VALUES (NEW.data_id, 'field1', OLD.field, NEW.field, CURRENT_DATETIME());
并重复它以对field2和field3进行修改
我认为这将是完整的触发器，请尝试：
DELIMITER $$DROP TRIGGER `update_data `$$CREATE TRIGGER `update_data` AFTER UPDATE on `data_table`FOR EACH ROWBEGIN IF (NEW.field1 != OLD.field1) THEN INSERT INTO data_tracking (`data_id` , `field` , `old_value` , `new_value` , `modified` ) VALUES (NEW.data_id, "field1", OLD.field1, NEW.field1, NOW()); END IF; IF (NEW.field2 != OLD.field2) THEN INSERT INTO data_tracking (`data_id` , `field` , `old_value` , `new_value` , `modified` ) VALUES (NEW.data_id, "field2", OLD.field2, NEW.field2, NOW()); END IF; IF (NEW.field3 != OLD.field3) THEN INSERT INTO data_tracking (`data_id` , `field` , `old_value` , `new_value` , `modified` ) VALUES (NEW.data_id, "field3", OLD.field3, NEW.field3, NOW()); END IF;END$$DELIMITER ;
