SID and sessionid

Hi,

I do:

SQL> select userenv('sessionid') from dual;

USERENV('SESSIONID')

                 149

SQL> select * from v$session where sid=149;

no rows selected

SID and SESSIONID are not the same ????

Thanks for any hints ...

Oracle 8.1.7
Linux

Oracle 8.1.7
Linux Received on Sun Dec 29 2002 - 08:43:02 CST