swapping a two rows in one update statement?

[PAVB]

SQL> 
SQL> create  table boring_test
  2  (emp_id number,
  3   name   varchar2(20))
  4  ;

Table created.

SQL> insert into boring_test values(102, 'sam');

1 row created.

SQL> insert into boring_test values(103, 'raj');

1 row created.

SQL> commit;

Commit complete.

SQL> select  *
  2  from    boring_test;

    EMP_ID NAME
---------- --------------------
       102 sam
       103 raj

SQL> 
SQL> update  boring_test
  2  set     name = decode(name, 'sam','raj','raj','sam',name)
  3  ;

2 rows updated.

SQL> commit;

Commit complete.

SQL> select  *
  2  from    boring_test;

    EMP_ID NAME
---------- --------------------
       102 raj
       103 sam

SQL>