00072.Oracle還原表空間切換

 

SQL> col name for a30;

SQL> col value for a40;

SQL> select name,value from v$parameter where name like '%undo%';

 

NAME                           VALUE

------------------------------ ----------------------------------------

undo_management                AUTO

undo_tablespace                UNDOTBS1

undo_retention                 9000

SQL> select tablespace_name ,status,contents from dba_tablespaces where contents='UNDO';

 

TABLESPACE_NAME                STATUS             CONTENTS

------------------------------ ------------------ ------------------

UNDOTBS1                       ONLINE             UNDO

TEST_UNDO                      ONLINE             UNDO

SQL> alter system set UNDO_TABLESPACE=test_undo;

System altered.

SQL> select name,value from v$parameter where name like '%undo%';

 

NAME                           VALUE

------------------------------ ----------------------------------------

undo_management                AUTO

undo_tablespace                TEST_UNDO

undo_retention                 9000

SQL> alter system set UNDO_TABLESPACE=undotbs1;

 

System altered.

SQL> select name,value from v$parameter where name like '%undo%';

 

NAME                           VALUE

------------------------------ ----------------------------------------

undo_management                AUTO

undo_tablespace                UNDOTBS1

undo_retention                 9000