[oracle@blliu ~]$ sqlplus test/test

SQL*Plus: Release 10.2.0.4.0 - Production on Sat Feb 27 13:27:07 2010

Copyright (c) 1982, 2007, Oracle.  All Rights Reserved.

Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> create table test (id number,description clob);

Table created.

SQL> select tablespace_name from user_segments where segment_name='TEST';

TABLESPACE_NAME
------------------------------
USERDATA

SQL> set linesize 200
SQL> col table_name format a30
SQL> col column_name format a30
SQL> col segment_name format a30
SQL> col tablespace_name format a30
SQL>  select table_name,column_name,segment_name,tablespace_name from user_lobs;

TABLE_NAME                     COLUMN_NAME                    SEGMENT_NAME                   TABLESPACE_NAME
------------------------------ ------------------------------ ------------------------------ ------------------------------
TEST                           DESCRIPTION                    SYS_LOB0000013214C00002$$      USERDATA

SQL> alter table test move tablespace users;

Table altered.

SQL> select tablespace_name from user_segments where segment_name='TEST';

TABLESPACE_NAME
------------------------------
USERS

SQL> select table_name,column_name,segment_name,tablespace_name from user_lobs;

TABLE_NAME                     COLUMN_NAME                    SEGMENT_NAME                   TABLESPACE_NAME
------------------------------ ------------------------------ ------------------------------ ------------------------------
TEST                           DESCRIPTION                    SYS_LOB0000013214C00002$$      USERDATA

SQL> alter table test move tablespace users lob(description) store as (tablespace users);

Table altered.

SQL> select tablespace_name from user_segments where segment_name='TEST';

TABLESPACE_NAME
------------------------------
USERS

SQL> select table_name,column_name,segment_name,tablespace_name from user_lobs;

TABLE_NAME                     COLUMN_NAME                    SEGMENT_NAME                   TABLESPACE_NAME
------------------------------ ------------------------------ ------------------------------ ------------------------------
TEST                           DESCRIPTION                    SYS_LOB0000013214C00002$$      USERS

SQL>