扔掉表，还能回来

create table aaabbb(
aa number primary key not null,
bb varchar2(255)
);
insert into aaabbb values(222,333);
select * from aaabbb;

drop table aaabbb;

select * from user_recyclebin where original_name = 'aaabbb';
FLASHBACK TABLE aaabbb to before drop;