查看数据库字符集: select * from sys.props$ where name='NLS_CHARACTERSET';
修改数据库字符集:
shutdown immediate;
startup mount exclusive;
alter system enable restricted session ;
alter system set job_queue_processes = 0;
alter system set aq_tm_processes =0;
alter database open;
alter database national character set AL16UTF16 ;
如果报错则更改成:ALTER DATABASE NATIONAL CHARACTER SET INTERNAL_USE AL16UTF16;
alter database character set zhs16GBK ;
如果报错则更改成: ALTER DATABASE CHARACTER SET INTERNAL_USE ZHS16GBK ;
shutdown immediate ;
startup
如果错误信息,请对照一下信息
如果提示:
ORA_12717 :Cannot issue ALTER DATABASE NATIONAL CHARACTER SET when NCLOB,NCHAR or NVARCHAR2 data exists
则改成以下语句:
alter database national character set INTERNAL_USE AL16UTF16 ;
如果提示:
ORA-12712 :new character set must be a superset of old character set ;
则更改使用以下语句:
alter database CHARACTER SET INTERNAL_USE ZHS16GBK;
如果提示:
ORA-12721: operation cannot execult where other sessions are active
则更改使用以下语句:
shutdown immediate;
startup mount exclusive ;
如果提示:
ORA-01109:database not open
则使用以下语句:
alter database open ;
如果提示:
ORA-12719:operation requires database is in restricted mode ;
则使用以下语句
alter system enable restricted session ;