按照上篇流程创建好CDB后，就可以往里面添加PDB了，可以使用如下几种方式：
a) 以SEED为模板创建PDB
b) 以一个已经存在的PDB为模板，创建新的PDB
c) 导入一个unplugged PDB
d) 使用一个non-CDB来创建一个PDB
当然最简单的方式还是用DBCA，点击几下 next 就可以了，这里我们使用SQL来创建，其实也不麻烦。切记一个CDB环境最多只包含253个PDB哦，而且包含SEED在内。不管是以SEED或者已有PDB为模板创建PDB，其实都是将源库的数据文件拷贝到新位置的过程。
对于创建PDB的语句，有几点注意的地方，如果指定了STORAGE子句，MAXSIZE指定一个PDB所有表空间能占用多少存储空间，可以用UNLIMITED指定无限制，MAX_SHARED_TEMP_SIZE指定该PDB可以使用多少共享临时表空间，也可以设置成UNLIMITED代表不限制。
a) 以SEED为模板创建PDB
SQL> l
1 CREATE PLUGGABLE DATABASE newpdb2 ADMIN USER pdbuser1 IDENTIFIED BY pdbpass1
2 STORAGE (MAXSIZE 2G MAX_SHARED_TEMP_SIZE 100M)
3 DEFAULT TABLESPACE dtbs
4 DATAFILE '/u01/oracle/oradata/newcdb/newpdb2/dtbs01.dbf' SIZE 250M AUTOEXTEND ON
5 PATH_PREFIX = '/u01/oracle/oradata/newcdb/newpdb2/'
6 FILE_NAME_CONVERT = ('/u01/oracle/oradata/newcdb/pdbseed/',
7* '/u01/oracle/oradata/newcdb/newpdb2/')
SQL> /
Pluggable database created.
SQL> show pdbs;
CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED READ ONLY NO
3 NEWPDB1 READ WRITE NO
4 NEWPDB2 MOUNTED
SQL> alter pluggable database newpdb2 open;
Pluggable database altered.
SQL> show pdbs;
CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED READ ONLY NO
3 NEWPDB1 READ WRITE NO
4 NEWPDB2 READ WRITE NO
b) 以一个已经存在的PDB为模板，创建新的PDB
SQL> alter pluggable database newpdb2 close;
Pluggable database altered.
SQL> alter pluggable database newpdb2 open read only;
Pluggable database altered.
SQL> CREATE PLUGGABLE DATABASE newpdb3 FROM newpdb2
2 PATH_PREFIX = '/u01/oracle/oradata/newcdb/newpdb3/'
3 FILE_NAME_CONVERT = ('/u01/oracle/oradata/newcdb/newpdb2/',
4 '/u01/oracle/oradata/newcdb/newpdb3/');
Pluggable database created.
SQL> alter pluggable database newpdb3 open;
Pluggable database altered.
SQL> show pdbs;
CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED READ ONLY NO
3 NEWPDB1 READ WRITE NO
4 NEWPDB2 READ ONLY NO
5 NEWPDB3 READ WRITE NO
c) 导入一个unplugged PDB
首先创建一个unplugged PDB，然后以一个新的PDB导入系统
SQL> alter pluggable database newpdb2 close;
Pluggable database altered.
SQL> alter pluggable database newpdb2 unplug into '/tmp/newpdb2.xml';
Pluggable database altered.
SQL> show pdbs;
CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED READ ONLY NO
3 NEWPDB1 READ WRITE NO
4 NEWPDB2 MOUNTED
SQL> drop pluggable database newpdb2 keep datafiles;
Pluggable database dropped.
SQL> show pdbs;
CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED READ ONLY NO
3 NEWPDB1 READ WRITE NO
SQL> create pluggable database newpdb3 using '/tmp/newpdb2.xml'
2 source_file_name_convert=('/u01/oracle/oradata/newcdb/newpdb2','/u01/oracle/oradata/newcdb/newpdb2')
3 copy
4 file_name_convert('/u01/oracle/oradata/newcdb/newpdb2','/u01/oracle/oradata/newcdb/newpdb3')
5 storage (maxsize unlimited max_shared_temp_size unlimited)
6 /
file_name_convert('/u01/oracle/oradata/newcdb/newpdb2','/u01/oracle/oradata/newcdb/newpdb3')
*
ERROR at line 4:
ORA-02000: missing = keyword
SQL> l
1 create pluggable database newpdb3 using '/tmp/newpdb2.xml'
2 source_file_name_convert=('/u01/oracle/oradata/newcdb/newpdb2','/u01/oracle/oradata/newcdb/newpdb2')
3 copy
4 file_name_convert('/u01/oracle/oradata/newcdb/newpdb2','/u01/oracle/oradata/newcdb/newpdb3')
5* storage (maxsize unlimited max_shared_temp_size unlimited)
SQL> define _editor=vi
SQL> ed
Wrote file afiedt.buf
1 create pluggable database newpdb3 using '/tmp/newpdb2.xml'
2 source_file_name_convert=('/u01/oracle/oradata/newcdb/newpdb2',
'/u01/oracle/oradata/newcdb/newpdb2')
3 copy
4 file_name_convert=('/u01/oracle/oradata/newcdb/newpdb2',
'/u01/oracle/oradata/newcdb/newpdb3')
5* storage (maxsize unlimited max_shared_temp_size unlimited)
SQL> /
Pluggable database created.
SQL> alter pluggable database newpdb3 open;
Pluggable database altered.
SQL> show pdbs;
CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED READ ONLY NO
3 NEWPDB1 READ WRITE NO
4 NEWPDB3 READ WRITE NO
