3.通过现有的PDB创建一个新的PDB

实验步骤：

1.创建测试数据

SQL> alter session set container=emp;
Session altered.

SQL> conn dsg/dsg@emp
Connected.
SQL> create table test (id number(8));
Table created.

SQL> begin
  2  for i in 1..100 loop
  3  insert into test values(i);
  4  end loop;
  5  commit;
  6  end;
  7  /
PL/SQL procedure successfully completed.

SQL> select count(*) from test;
  COUNT(*)
----------
       100

2.通过现有PDB创建新的PDB  EMPTEST

SQL> conn / as sysdba
Connected.
SQL> create pluggable database emptest from emp;
create pluggable database emptest from emp
*
ERROR at line 1:
ORA-65081: database or pluggable database is not open in read only mode
----源数据库必须在read only状态

SQL> alter pluggable database emp close;

Pluggable database altered.

SQL> alter pluggable database emp open read only;
Pluggable database altered.

SQL> create pluggable database emptest from emp;
Pluggable database created.

3.在tnsnames.ora中添加下面的信息，这样就可以通过服务名连接数据库了

EMPTEST =   (DESCRIPTION =     (ADDRESS = (PROTOCOL = TCP)(HOST = localhost.localdomain)(PORT = 1521))     (CONNECT_DATA =       (SERVER = DEDICATED)       (SERVICE_NAME = EMPTEST)     )   )

新的PDB创建成功，查看alert日志：

create pluggable database emptest from emp Sun Jan 19 22:26:48 2014 **************************************************************** Pluggable Database EMPTEST with pdb id - 4 is created as UNUSABLE. If any errors are encountered before the pdb is marked as NEW, then the pdb must be dropped **************************************************************** Deleting old file#7 from file$ Deleting old file#8 from file$ Deleting old file#9 from file$ Adding new file#12 to file$(old file#7) Adding new file#13 to file$(old file#8) Adding new file#14 to file$(old file#9) Successfully created internal service emptest at open ALTER SYSTEM: Flushing buffer cache inst=0 container=4 local **************************************************************** Post plug operations are now complete. Pluggable database EMPTEST with pdb id - 4 is now marked as NEW. **************************************************************** Completed: create pluggable database emptest from emp

PDB的一些更改操作不能在CDB级别更改，必须切换到PDB下，下面以修改GLOBAL_NAME为例：

SQL> select service_id,name,pdb from v$services;

SQL> alter pluggable database emptest rename global_name to emp_test;
alter pluggable database emptest rename global_name to emp_test
                                                       *
ERROR at line 1:
ORA-65046: operation not allowed from outside a pluggable database

SQL> alter pluggable database emptest close;
alter pluggable database emptest close
*
ERROR at line 1:
ORA-65020: pluggable database EMPTEST already closed

下面以RESTRICTED 模式打开数据库
SQL> alter pluggable database emptest open restricted;
Pluggable database altered.

SQL> conn sys/oracle@emptest as sysdba
Connected.
SQL> alter pluggable database emptest rename global_name to emp_test;
Pluggable database altered.

SQL> select service_id,name,pdb from v$services;

SERVICE_ID NAME                                                             PDB
---------- ---------------------------------------------------------------- ------------------------------
         1 emp_test                                                         EMP_TEST

SQL> conn / as sysdba
Connected.
SQL> select service_id,name,pdb from v$services;

SERVICE_ID NAME                                                             PDB
---------- ---------------------------------------------------------------- ------------------------------
         1 emp_test                                                         EMP_TEST
         6 emp                                                                   EMP
         3 ora12cXDB                                                        CDB$ROOT
         4 ora12c                                                                 CDB$ROOT
         1 SYS$BACKGROUND                                          CDB$ROOT
         2 SYS$USERS                                                        CDB$ROOT

6 rows selected.