和普通实例1样的连接。 指定ORACLE_SID 以后可使用OS认证，也能够使用密码进行连接。
[oracle@Ora12c /]$ echo $ORACLE_SID
cndba
[oracle@Ora12c /]$ sqlplus / as sysdba
SQL*Plus: Release 12.1.0.1.0 Production onMon Apr 28 11:33:43 2014
Copyright (c) 1982, 2013, Oracle. All rights reserved.
Connected to:
Oracle Database 12c Enterprise EditionRelease 12.1.0.1.0 - 64bit Production
With the Partitioning, OLAP, AdvancedAnalytics and Real Application Testing options
SQL> conn system/oracle
Connected.
SQL>
--查看CDB中可用的service：
SQL> COLUMN name FORMAT A30
SQL> SELECT name,pdb
2 FROM v$services
3 ORDER BY name;
NAME PDB
------------------------------------------------------------
SYS$BACKGROUND CDB$ROOT
SYS$USERS CDB$ROOT
cndba CDB$ROOT
cndbaXDB CDB$ROOT
pcndba2 PCNDBA2
pdbcndba PDBCNDBA
6 rows selected.
--通过lsnrctl 也能够判断：
[oracle@Ora12c /]$ lsnrctl service
LSNRCTL for Linux: Version 12.1.0.1.0 -Production on 28-APR⑵014 11:35:31
Copyright (c) 1991, 2013, Oracle. All rights reserved.
Connecting to(DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
Services Summary...
Service "cndba" has 1instance(s).
Instance "cndba", status READY, has 1 handler(s) for thisservice...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
Service "cndbaXDB" has 1instance(s).
Instance "cndba", status READY, has 1 handler(s) for thisservice...
Handler(s):
"D000" established:0 refused:0 current:0 max:1022 state:ready
DISPATCHER <machine: Ora12c, pid: 10085>
(ADDRESS=(PROTOCOL=tcp)(HOST=Ora12c)(PORT=14696))
Service "pcndba2" has 1instance(s).
Instance "cndba", status READY, has 1 handler(s) for thisservice...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
Service "pdbcndba" has 1instance(s).
Instance "cndba", status READY, has 1 handler(s) for thisservice...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
The command completed successfully
[oracle@Ora12c /]$
通过这些service，就能够远程连接CDB。
--EZCONNECT
C:UsersDave>sqlplussystem/oracle@192.168.1.10:1521/cndba
SQL*Plus: Release 11.2.0.1.0 Production on 星期3 4月 30 11:36:48 2014
Copyright (c) 1982, 2010, Oracle. All rights reserved.
连接到:
Oracle Database 12c Enterprise EditionRelease 12.1.0.1.0 - 64bit Production
With the Partitioning, OLAP, AdvancedAnalytics and Real Application Testing options
SQL>
--通过TNSNAMES.ORA连接：
在tnsnames.ora 中配置以下：
cndba =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.10)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = cndba)
)
)
--连接：
C:UsersDave>sqlplussystem/oracle@cndba
SQL*Plus: Release 11.2.0.1.0 Production on 星期3 4月 30 11:40:01 2014
Copyright (c) 1982, 2010, Oracle. All rights reserved.
连接到:
Oracle Database 12c Enterprise EditionRelease 12.1.0.1.0 - 64bit Production
With the Partitioning, OLAP, AdvancedAnalytics and Real Application Testing options
SQL>
在12c的架构中，由于有CDB和 PDB的存在，所以会有很多不同的container，所以在连接到不同的container时，就需要进行切换。
--查看当前的container：
SQL> show con_name
CON_NAME
------------------------------
CDB$ROOT
SQL> SELECT SYS_CONTEXT('USERENV','CON_NAME') FROM dual;
SYS_CONTEXT('USERENV','CON_NAME')
--------------------------------------------------------------------------------
CDB$ROOT
SQL> set lin 140
SQL> select con_id, dbid,guid, name , open_mode from v$pdbs;
CON_ID DBID GUID NAME OPEN_MODE
---------- ------------------------------------------ ---------- ----------
2 4088301206 F7C1E3C96BBF0585E0430A01A8C05459 PDB$SEED READ ONLY
3 426143573F7C209EB1DFC0854E0430A01A8C0B787 PDBCNDBA READ WRITE
4 1231796139 F812DE1B6A8F363AE0430A01A8C0C759 PCNDBA2 READ WRITE
--切换container：
SQL> alter session setcontainer=pcndba2;
Session altered.
SQL> show con_name
CON_NAME
------------------------------
PCNDBA2
--EZCONNECT:
C:UsersDave>sqlplussystem/oracle@192.168.1.10:1521/pcndba2
SQL*Plus: Release 11.2.0.1.0 Production on 星期3 4月 30 11:54:30 2014
Copyright (c) 1982, 2010, Oracle. All rights reserved.
连接到:
Oracle Database 12c Enterprise EditionRelease 12.1.0.1.0 - 64bit Production
With the Partitioning, OLAP, AdvancedAnalytics and Real Application Testing options
SQL>
--TNSNAMES.ora
在tnsnames.ora 中添加以下内容：
pcndba =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.10)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = pcndba2)
)
)
C:UsersDave>sqlplussystem/oracle@pcndba
SQL*Plus: Release 11.2.0.1.0 Production on 星期3 4月 30 11:55:50 2014
Copyright (c) 1982, 2010, Oracle. All rights reserved.
连接到:
Oracle Database 12c Enterprise EditionRelease 12.1.0.1.0 - 64bit Production
With the Partitioning, OLAP, AdvancedAnalytics and Real Application Testing options
SQL>
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CNDBA_1: 104207940 (满) CNDBA_2: 62697716 (满) CNDBA_3: 283816689
CNDBA_4: 391125754 CNDBA_5: 62697850 CNDBA_6: 62697977 CNDBA_7: 142216823（满）