看一个简单的例子，如果建立分区表的时候不明确指定LOB分区信息：

SQL> SELECT * FROM TAB;

未选定行

SQL> SELECT DEFAULT_TABLESPACE
  2  FROM USER_USERS;

DEFAULT_TABLESPACE
------------------------------
YANGTK

SQL> CREATE TABLE T_LOB
  2  (ID NUMBER,
  3  CREATE_DATE DATE,
  4  CONTENTS CLOB)
  5  LOB (CONTENTS) STORE AS CONTENTS_LOB
  6  PARTITION BY RANGE (CREATE_DATE)
  7  (PARTITION P1 VALUES LESS THAN (TO_DATE('2009-1', 'YYYY-MM')) TABLESPACE TEST,
  8  PARTITION P2 VALUES LESS THAN (TO_DATE('2010-1', 'YYYY-MM')) TABLESPACE USERS,
  9  PARTITION P3 VALUES LESS THAN (TO_DATE('2011-1', 'YYYY-MM')));

表已创建。

SQL> SELECT TABLE_NAME, PARTITION_NAME, TABLESPACE_NAME
  2  FROM USER_TAB_PARTITIONS;

TABLE_NAME                     PARTITION_NAME                 TABLESPACE_NAME
------------------------------ ------------------------------ ------------------------------
T_LOB                          P3                             YANGTK
T_LOB                          P1                             TEST
T_LOB                          P2                             USERS

SQL> SELECT SEGMENT_NAME, PARTITION_NAME, SEGMENT_TYPE, TABLESPACE_NAME
  2  FROM USER_SEGMENTS;

SEGMENT_NAME              PARTITION_NAME       SEGMENT_TYPE       TABLESPACE_NAME
------------------------- -------------------- ------------------ ---------------
T_LOB                     P1                   TABLE PARTITION    TEST
T_LOB                     P2                   TABLE PARTITION    USERS
T_LOB                     P3                   TABLE PARTITION    YANGTK
SYS_IL0000086250C00003$$  SYS_IL_P49           INDEX PARTITION    TEST
SYS_IL0000086250C00003$$  SYS_IL_P50           INDEX PARTITION    USERS
SYS_IL0000086250C00003$$  SYS_IL_P51           INDEX PARTITION    YANGTK
CONTENTS_LOB              SYS_LOB_P46          LOB PARTITION      TEST
CONTENTS_LOB              SYS_LOB_P47          LOB PARTITION      USERS
CONTENTS_LOB              SYS_LOB_P48          LOB PARTITION      YANGTK

已选择9行。

对于LOB分区的存储，可以通过LOB分区语句进行设置：

SQL> DROP TABLE T_LOB PURGE;

表已删除。

SQL> CREATE TABLE T_LOB
  2  (ID NUMBER,       
  3  CREATE_DATE DATE,
  4  CONTENTS CLOB)
  5  LOB (CONTENTS) STORE AS CONTENTS_LOB
  6  PARTITION BY RANGE (CREATE_DATE)
  7  (PARTITION P1 VALUES LESS THAN (TO_DATE('2009-1', 'YYYY-MM')) TABLESPACE TEST
  8  LOB (CONTENTS) STORE AS CP1 (TABLESPACE USERS),
  9  PARTITION P2 VALUES LESS THAN (TO_DATE('2010-1', 'YYYY-MM'))
 10  LOB (CONTENTS) STORE AS CP2 (TABLESPACE TEST),
 11  PARTITION P3 VALUES LESS THAN (TO_DATE('2011-1', 'YYYY-MM')) TABLESPACE YANGTK);

表已创建。

SQL> SELECT SEGMENT_NAME, PARTITION_NAME, SEGMENT_TYPE, TABLESPACE_NAME
  2  FROM USER_SEGMENTS;

SEGMENT_NAME              PARTITION_NAME       SEGMENT_TYPE       TABLESPACE_NAME
------------------------- -------------------- ------------------ ---------------
T_LOB                     P1                   TABLE PARTITION    TEST
T_LOB                     P2                   TABLE PARTITION    YANGTK
T_LOB                     P3                   TABLE PARTITION    YANGTK
SYS_IL0000086262C00003$$  SYS_IL_P53           INDEX PARTITION    USERS
SYS_IL0000086262C00003$$  SYS_IL_P54           INDEX PARTITION    TEST
SYS_IL0000086262C00003$$  SYS_IL_P55           INDEX PARTITION    YANGTK
CONTENTS_LOB              CP1                  LOB PARTITION      USERS
CONTENTS_LOB              CP2                  LOB PARTITION      TEST
CONTENTS_LOB              SYS_LOB_P52          LOB PARTITION      YANGTK

已选择9行。

对于没有明确指定LOB分区存储表空间的分区，其默认表空间设置依赖对应的分区的表空间。而且可以看到，LOB索引的分区的表空间设置，完全依赖LOB分区设置，而和表分区的表空间设置没有关系。