oracle characters strange problem

From: <amitkr.3_at_gmail.com>
Date: 15 Feb 2006 04:51:31 -0800
Message-ID: <1140007891.536054.267590_at_g47g2000cwa.googlegroups.com>

Hi ,
[Quoted] Please explain this behavior of my oracle 8i

select chr(163) from dual

selects

#

select chr(35) from dual

selects

#

And
select chr(163) from dual
minus
select chr(35) from dual
selects a

#

What is the problem here ????

Many thanks for any hint Received on Wed Feb 15 2006 - 13:51:31 CET