现建一个表空间测试：
SQL>create tablespace tbs datafile 'E:\ORADATA\YP\tbs01.DBF' size 1G autoextend off;
SQL>select tablespace_name,status from dba_tablespaces;

TABLESPACE_NAME                STATUS
------------------------------ ---------
SYSTEM                         ONLINE
UNDOTBS1                       ONLINE
SYSAUX                         ONLINE
TEMP                           ONLINE
USERS                          ONLINE
TBS                            ONLINE

6 rows selected

将表空间 更改为read only

SQL> alter tablespace tbs READ ONLY;

Tablespace altered

SQL>select tablespace_name,status from dba_tablespaces;

TABLESPACE_NAME                STATUS
------------------------------ ---------
SYSTEM                         ONLINE
UNDOTBS1                       ONLINE
SYSAUX                         ONLINE
TEMP                           ONLINE
USERS                          ONLINE
TBS                            READ ONLY

6 rows selected

SQL>

如何将read only更改为 onlie的呢？ google了一下 没有查找到需要的信息，最后全部换成英文关键字终于找到了答案

SQL> alter tablespace tbs read write;

Tablespace altered

SQL>  select tablespace_name,status from dba_tablespaces;

TABLESPACE_NAME                STATUS
------------------------------ ---------
SYSTEM                         ONLINE
UNDOTBS1                       ONLINE
SYSAUX                         ONLINE
TEMP                           ONLINE
USERS                          ONLINE
TBS                            ONLINE

6 rows selected

SQL>

 本来都想在itput上发问的，看来对于google的利用还很少，以后要加强 呵呵。