How to kill all active and inactive oracle sessions for user

Question

I am trying the below script to kill all active and inactive oracle sessions for user at once but it doesn\'t work. The script executes successfully but does not kill sessions f

Answer 1

BEGIN
  FOR r IN (select sid,serial# from v$session where username='user')
  LOOP
      EXECUTE IMMEDIATE 'alter system kill session ''' || r.sid  || ',' || r.serial# || '''';
  END LOOP;
END;
/

It works for me.