SQL>drop user myuser cascade;
drop user username cascade
*
ERROR at line 1:
ORA-01940: cannot drop a user that is currently connected
SQL>select s.sid, s.serial#, s.status, p.spid from v$session s,
v$process p where s.username = 'myuser' and p.addr (+) = s.paddr;
SID SERIAL# STATUS SPID
---------- ---------- -------- ------------
159 29 INACTIVE 12349
SQL>alter system kill session '159,29';
System altered.
or
SQL>!kill -9 12349 - (kill the process in OS level)
SQL>drop user username cascade;
User dropped.
