修改oracle 10g的字符集
Oracle
修改数据库字符集为：ZHS16GBK
查看服务器端字符集SQL > select * from V$NLS_PARAMETERS
修改：$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>shutdown immediate
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
ERROR at line 1:ORA-12721: operation cannot execute when other sessions are active
若出现上面的错误，使用下面的办法进行修改，使用INTERNAL_USE可以跳过超集的检查：
SQL>ALTER DATABASE CHARACTER SET INTERNAL_USE ZHS16GBK
SQL>SHUTDOWN IMMEDIATE
SQL>STARTUP
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