select * from v$nls_parameters where parameter='NLS_CHARACTERSET'



????????????????????????SQL> SHUTDOWN IMMEDIATE;?
????????????????????????SQL> STARTUP MOUNT;?
????????????????????????SQL> ALTER SYSTEM ENABLE RESTRICTED SESSION;?
????????????????????????SQL> ALTER SYSTEM SET JOB_QUEUE_PROCESSES=0;?
????????????????????????SQL> ALTER DATABASE OPEN;?
????????????????????????SQL> ALTER DATABASE CHARACTER SET?AL32UTF8/ZHS16GBK;
????????????????????????SQL> SHUTDOWN IMMEDIATE;
????????????????????????SQL> STARTUP;
//修改字符集? UTF-8? ->? GBK