上次刚装完Oracle，但是字符集忘记改了，在网上找了资料，成功。
$sqlplus /nolog SQL>conn / as sysdba; 若此时数据库服务器已启动，则先执行SHUTDOWN IMMEDIATE命令关闭数据库服务器，然后执行以下命令: SQL>STARTUP MOUNT; SQL>ALTER SYSTEM ENABLE RESTRICTED SESSION; 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 ZHS16GBK; SQL>ALTER DATABASE national CHARACTER SET ZHS16GBK; SQL>SHUTDOWN IMMEDIATE; SQL>STARTUP SQL>select * from nls_database_parameters
