数据库触发器删除报错PL/SQL:ORA00904:标识符无效

触发器作用&＃xff1a;删除Reader表记录后自动将Borrow表中对应的记录删去。
代码&＃xff1a;

DROP TRIGGER Reader_delete;CREATE TRIGGER Reader_delete
AFTER DELETE ON Reader
REFERENCING OLD AS olde
FOR EACH ROW
BEGINDELETE FROM Borrow WHERE ReaNo &＃61; olde.ReaNo;
END;

结果报错&＃xff1a;

LINE/COL ERROR
--------- -------------------------------------------------------------
2/8 PL/SQL: SQL Statement ignored
2/42 PL/SQL: ORA-00904: "OLDE"."REANO": 标识符无效
错误: 查看编译器日志


结果截图&＃xff1a;

解决办法&＃xff1a;
在olde.ReaNo(表示要被更改的原来的数据行)前面添加冒号:(输入法英文状态下的)。