oracle11g 未知字符集标记

查看字符集：select userenv ('language') from dual;

修改：

SHUTDOWN IMMEDIATE
STARTUP MOUNT;
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 ZHS16GBK;

重启后

select userenv ('language') from dual;