我遇到错误“#1363 - DELETE 触发器中没有新行”

Question

我有book和store_order桌子。

我想制作触发器（但它包含错误）：

DELIMITER $$
    
CREATE TRIGGER t1 
BEFORE DELETE ON store_order
FOR EACH ROW 
BEGIN
    
    UPDATE book SET number = number + NEW.quantity WHERE ISBN = NEW.ISBN;
    
END
$$
    
DELIMITER ;

Answer 1

DELIMITER $$
CREATE
    TRIGGER t2 AFTER delete 
    ON library.store_order
    FOR EACH ROW BEGIN

        update library.book 
        set library.book.number = (library.book.number + OLD.quantity)
        where library.book.ISBN = OLD.ISBN;

    END$$
DELIMITER ;