如何向数据库中插入带有?或者&呢？

SQL> insert into t (id) values(chr(63));

1 row inserted

SQL> insert into t (id) values(chr(38));

1 row inserted

SQL> select * from t;

ID
--------------------
?
&

SQL> insert into t values ('aa'||chr(63)||'bb'||chr(38)||'c');

1 row inserted

SQL> select * from t;

ID
--------------------
?
&
aa?bb&c

select ascii('&') from dual;

way2:

?没有问题，&可以set define off关闭
set define off
insert into tmp values('aa?a&a');