第一步:确认你要备份的机上的帐户和密码跟你登录的一样或备份机的GUEST帐户打开并有访问共享文件夹的权限
要是域用户就填域名\用户名
工作组就填计算机名\用户名
第二步:企业管理器的SQL属性里的安全性选项选本帐号

backup database 数据库名 to disk='UNC名'
///////////////////////////////////////////////////////////////
软件环境：
1、Windows NT4.0+ORACLE 8.0.4
2、ORACLE安装路径为：C:\ORANT

实现方法：
SQL> conn sys/change_on_install
SQL> desc props$
SQL> set arraysize 1
SQL> col value$ format a40--格式化value$的输出为40个字符宽
SQL> select name,value$ from props$ where name='NLS_CHARACTERSET';

SQL> conn system/manager
SQL> select * from nls_database_parameters;
SQL> select * from V$NLS_PARAMETERS;

SQL> select * from nls_database_parameters;

PARAMETER                                value
---------------------------------------- -------------------
NLS_LANGUAGE                             AMERICAN
NLS_TERRITORY                            AMERICA
NLS_CURRENCY                             $
NLS_ISO_CURRENCY                         AMERICA
NLS_NUMERIC_CHARACTERS                   .,
NLS_CALENDAR                             GREGORIAN
NLS_DATE_formAT                          DD-MON-YY
NLS_DATE_LANGUAGE                        AMERICAN
NLS_CHARACTERSET                         ZHS16GBK
NLS_SORT                                 BINARY
NLS_NCHAR_CHARACTERSET                   ZHS16GBK
NLS_RDBMS_VERSION                        8.0.4.0.0

查询到12记录.

SQL> select * from V$NLS_PARAMETERS;

PARAMETER                                value
---------------------------------------- -------------------
NLS_LANGUAGE                             SIMPLIFIED CHINESE
NLS_TERRITORY                            CHINA
NLS_CURRENCY                             RMB
NLS_ISO_CURRENCY                         CHINA
NLS_NUMERIC_CHARACTERS                   .,
NLS_CALENDAR                             GREGORIAN
NLS_DATE_formAT                          DD-MON-YY
NLS_DATE_LANGUAGE                        SIMPLIFIED CHINESE
NLS_CHARACTERSET                         ZHS16GBK
NLS_SORT                                 BINARY
NLS_NCHAR_CHARACTERSET                   ZHS16GBK

查询到11记录.