oracle字符集修改（AL32UTF8->UTF8）

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author：skate
time：2012/04/10

AL32UTF8->UTF8

步骤
shutdown immediate;
startup mount;
alter session set sql_trace=true;
alter system enable restricted session;
alter system set job_queue_processes=0;
alter system set aq_tm_processes=0;
alter database open;
alter database character set internal_use utf8;
alter session set sql_trace=false;
shutdown immediate;
startup;

[root@detaildb ~]# su - oracle
[oracle@detaildb ~]$ sqlplus "/as sysdba"

SQL*Plus: Release 11.2.0.2.0 Production on Fri Apr 6 09:55:53 2012

Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL>

修改之前的字符集
SQL> select * from v$nls_parameters where parameter='NLS_CHARACTERSET';

PARAMETER VALUE
----------------- ----------------------------
NLS_CHARACTERSET AL32UTF8

SQL>

开始修改
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount;
ORACLE instance started.

Total System Global Area 1603411968 bytes
Fixed Size                  2226912 bytes
Variable Size             402654496 bytes
Database Buffers         1191182336 bytes
Redo Buffers                7348224 bytes
Database mounted.
SQL> alter session set sql_trace=true;

Session altered.

SQL> alter system enable restricted session;

System altered.

SQL> show parameter job_queue_process

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
job_queue_processes integer 1000
SQL> alter system set job_queue_processes=0;

System altered.

SQL> show parameter aq_tm_processes

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
aq_tm_processes integer 0
SQL> alter database open;

Database altered.

SQL> alter database character set internal_use utf8;

Database altered.

SQL> alter session set sql_trace=flase;
alter session set sql_trace=flase
*
ERROR at line 1:
ORA-00922: missing or invalid option

SQL> alter session set sql_trace=false;

Session altered.

SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup
ORACLE instance started.

修改之后的字符集
SQL> select * from v$nls_parameters where parameter='NLS_CHARACTERSET';

PARAMETER VALUE
----------------- ----------------------------
NLS_CHARACTERSET UTF8

SQL>

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