[ORACLE] ORACLE 193 pdb 创建与pdb/cdba切换

1. 创建PDB
2. PDB/CDB 切换

Container ID	Rows pertain to
0	Whole CDB, or non-CDB
1	CDB$ROOT
2	PDB$SEED
All Other IDs	User-Created PDBs

 https://docs.oracle.com/database/121/CNCPT/cdblogic.htm#CNCPT89459

1.创建PDB

SQL> select pdb_name,status from cdb_pdbs ; 

PDB_NAME                                                             STATUS
-------------------------------------------------------------------------------------------------------------------------------- ----------
D3CPDB                                                                 NORMAL
PDB$SEED                                                             NORMAL

SQL> create pluggable database D4CPDB admin user D4CPDB_admin identified by "12345678" roles=(dba) file_name_convert=('/oracle/D4C/oradata/D4CDB/pdbseed','/oracle/D4C/oradata/D4CDB/D4CPDB') ; 

Pluggable database created.

SQL> select pdb_name,status from cdb_pdbs ; 

PDB_NAME                                                             STATUS
-------------------------------------------------------------------------------------------------------------------------------- ----------
D3CPDB                                                                 NORMAL
PDB$SEED                                                             NORMAL
D4CPDB                                                                 NEW

SQL> select con_id,dbid,NAME,OPEN_MODE from v$pdbs;

    CON_ID     DBID NAME                                                                   OPEN_MODE
---------- ---------- -------------------------------------------------------------------------------------------------------------------------------- ----------
     2  482843019 PDB$SEED                                                                   READ ONLY
     3   50879882 D3CPDB                                                                   READ WRITE
     4 3947681941 D4CPDB                                                                   MOUNTED

SQL> alter PLUGGABLE database D4CPDB open;

Pluggable database altered.

SQL> select con_id,dbid,NAME,OPEN_MODE from v$pdbs;

    CON_ID     DBID NAME                                                                   OPEN_MODE
---------- ---------- -------------------------------------------------------------------------------------------------------------------------------- ----------
     2  482843019 PDB$SEED                                                                   READ ONLY
     3   50879882 D3CPDB                                                                   READ WRITE
     4 3947681941 D4CPDB                                                                   READ WRITE

SQL> alter PLUGGABLE database D4CPDB close;

Pluggable database altered.

SQL> select con_id,dbid,NAME,OPEN_MODE from v$pdbs;

    CON_ID     DBID NAME                                                                   OPEN_MODE
---------- ---------- -------------------------------------------------------------------------------------------------------------------------------- ----------
     2  482843019 PDB$SEED                                                                   READ ONLY
     3   50879882 D3CPDB                                                                   READ WRITE
     4 3947681941 D4CPDB                                                                   MOUNTED

2.PDB/CDB 切换

#切换PDB
SQL> alter session set container=D3CPDB;

Session altered.

SQL> select con_id,dbid,NAME,OPEN_MODE from v$pdbs;

    CON_ID     DBID NAME                                                                   OPEN_MODE
---------- ---------- -------------------------------------------------------------------------------------------------------------------------------- ----------
     3   50879882 D3CPDB                                                                   READ WRITE
SQL> show con_name;

CON_NAME
------------------------------
D3CPDB
#切换PDB#SEED
SQL> alter session set container=PDB$SEED;

Session altered.

SQL> show con_name;

CON_NAME
------------------------------
PDB$SEED

SQL> show pdbs

    CON_ID CON_NAME              OPEN MODE  RESTRICTED
---------- ------------------------------ ---------- ----------
     2 PDB$SEED              READ ONLY  NO
     3 D3CPDB              READ WRITE NO
     4 D4CPDB              READ WRITE NO
SQL> alter pluggable database all close immediate ; 

Pluggable database altered.

SQL> show pdbs

    CON_ID CON_NAME              OPEN MODE  RESTRICTED
---------- ------------------------------ ---------- ----------
     2 PDB$SEED              READ ONLY  NO
     3 D3CPDB              MOUNTED
     4 D4CPDB              MOUNTED
     
SQL> alter session set container=D3CPDB;

Session altered.

SQL> show con_name

CON_NAME
------------------------------
D3CPDB
#切换CDB
SQL> alter session set container=CDB$ROOT;

Session altered.

SQL> show con_name

CON_NAME
------------------------------
CDB$ROOT