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日常工作需要记住这两个视图，检查pdb状态
$sqlplus / as sysdba
SQL*Plus: Release 12.1.0.2.0 Production on Sat Jan 20 17:52:42 2018
Copyright (c) 1982, 2014, Oracle. All rights reserved.
Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options
SQL> show con_name
CON_NAME
------------------------------
CDB$ROOT
SQL> desc cdb_pdbs;
Name Null? Type
----------------------------------------- -------- ----------------------------
PDB_ID NOT NULL NUMBER
PDB_NAME NOT NULL VARCHAR2(128)
DBID NOT NULL NUMBER
CON_UID NOT NULL NUMBER
GUID RAW(16)
STATUS VARCHAR2(9)
CREATION_SCN NUMBER
VSN NUMBER
LOGGING VARCHAR2(9)
FORCE_LOGGING VARCHAR2(3)
FORCE_NOLOGGING VARCHAR2(3)
CON_ID NOT NULL NUMBER
SQL> col pdb_name for a30
SQL> select pdb_id,pdb_name,status from cdb_pdbs;
PDB_ID PDB_NAME STATUS
---------- ------------------------------ ------------------
2 PDB$SEED NORMAL
3 PDB1 NORMAL
4 PDB2 NORMAL
5 PDB3 NORMAL
6 PDB4 NORMAL
SQL> desc v$pdbs;
Name Null? Type
----------------------------------------- -------- ----------------------------
CON_ID NUMBER
DBID NUMBER
CON_UID NUMBER
GUID RAW(16)
NAME VARCHAR2(30)
OPEN_MODE VARCHAR2(10)
RESTRICTED VARCHAR2(3)
OPEN_TIME TIMESTAMP(3) WITH TIME ZONE
CREATE_SCN NUMBER
TOTAL_SIZE NUMBER
BLOCK_SIZE NUMBER
RECOVERY_STATUS VARCHAR2(8)
SNAPSHOT_PARENT_CON_ID NUMBER
SQL> set line 200
SQL> select con_id,name,open_mode from v$pdbs;
CON_ID NAME OPEN_MODE
---------- ------------------------------------------------------------ --------------------
2 PDB$SEED READ ONLY
3 PDB1 READ WRITE
4 PDB2 READ WRITE
5 PDB3 READ WRITE
6 PDB4 READ WRITE
SQL>
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