在CentOS 6.4上安装Oracle 11g没有设定字符集,采用的是操作系统默认字符集:WE8MSWIN1252,将字符集修改为:AL32UTF8。
SQL> select userenv('language') from dual;
SIMPLIFIED CHINESE_CHINA.WE8MSWIN1252
SQL> select * from nls_database_parameters where parameter in ('NLS_CHARCTERSET','NLS_NCHAR_CHARACTERSET');
SQL> select* from v$nls_parameters where parameter='NLS_CHARACTERSET';
操作过程如下:
SQL> shutdown immediate
SQL> startup
SQL> alter session set sql_trace=true;
SQL> alter system enable restricted session;
SQL> show parameter job_queue_processes;
SQL> alter system set job_queue_processes=0;
SQL> alter system set aq_tm_processes=0;
SQL> alter database open;
SQL> alter database character set INTERNAL_USE AL32UTF8;
SQL> update props$ set VALUE$='UTF8' where NAME='NLS_NCHAR_CHARACTERSET';
改变字符集后,原来已有的数据不会改变,只是之后新增的数据会是新的字符集。
Oracle字符集的查看和修改 http://www.linuxidc.com/Linux/2013-07/87538.htm
Oracle字符集的查看查询和Oracle字符集的设置修改 http://www.linuxidc.com/Linux/2011-11/47383.htm