Plus ,

alter table <<tablename>> move

would change the rowids, obviously!!


SQL> create table test1 (c1 number);

Table created.

SQL> insert into test1 select rownum from user_objects where rownum<4;

3 rows created.

SQL> select rowid,c1 from test1;

ROWID                      C1
------------------ ----------
AAAF6DAAKAAGwJ1AAA          1
AAAF6DAAKAAGwJ1AAB          2
AAAF6DAAKAAGwJ1AAC          3

SQL> alter table test1 move;

Table altered.

SQL> select rowid,c1 from test1;

ROWID                      C1
------------------ ----------
AAAF6EAAKAAGwKEAAA          1
AAAF6EAAKAAGwKEAAB          2
AAAF6EAAKAAGwKEAAC          3

SQL>