Rename or Relocate Datafile

1.
ALTER TABLESPACE users OFFLINE NORMAL;
2.
ALTER TABLESPACE users
    RENAME DATAFILE '/u02/oracle/rbdb1/user1.dbf',
                    '/u02/oracle/rbdb1/user2.dbf'
                 TO '/u02/oracle/rbdb1/users01.dbf',
                    '/u02/oracle/rbdb1/users02.dbf';
3.
SELECT FILE_NAME, BYTES FROM DBA_DATA_FILES WHERE TABLESPACE_NAME = 'USERS';
4.
Copy the datafiles to their new locations and rename them using the operating system.
5.
ALTER TABLESPACE users
    RENAME DATAFILE '/u02/oracle/rbdb1/users01.dbf',
                    '/u02/oracle/rbdb1/users02.dbf'
                 TO '/u03/oracle/rbdb1/users01.dbf',
                    '/u04/oracle/rbdb1/users02.dbf';