Oracle 11g修改字符集

选择静默安装的安装字符集为默认的ZHS16GBK，工作中字符集为为AL32UTF8

一、登录oracle

sqlplus / as sysdba

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 AL32UTF8;
ALTER SESSION SET SQL_TRACE=FALSE;
shutdown immediate;
startup;

风险分析：执行上述命令，有可能造成数据库中已有数据混乱的情况，所以在进行操作前，

要进行数据库的备份操作；
因为我是刚刚静默安装完成所有省略了备份库

二、查看当前字符集

SQL> select userenv('language') from dual;

USERENV('LANGUAGE')
----------------------------------------------------
AMERICAN_AMERICA.AL32UTF8

查看变更记录

SQL> SELECT parameter, value FROM v$nls_parameters WHERE parameter LIKE '%CHARACTERSET';

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

NLS_NCHAR_CHARACTERSET
AL16UTF16