1.将tool表空间设置为只读状态。
SQL> alter tablespace tool read only;
Tablespace altered.
SQL> select tablespace_name,status from dba_tablespaces where tablespace_name='TOOL';
TABLESPACE_NAME STATUS
------------------------------ ---------
TOOL READ ONLY
2.将test1表空间offline。
SQL> alter tablespace test1 offline;
Tablespace altered.
SQL> select tablespace_name,status from dba_tablespaces where tablespace_name='TEST1';
TABLESPACE_NAME STATUS
------------------------------ ---------
TEST1 OFFLINE