EXP-00091: Exporting questionable statistics
在使用EXP工具进行导出备份或迁移数据的时候有时会报很多的ldquo;EXP-00091: Exporting questionable statisticsrdquo;错误,处
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EXP-00091: Exporting questionable statistics
[日期：2014-11-06] 来源：Linux社区 作者：彭小波 [字体：]
在使用EXP工具进行导出备份或迁移数据的时候有时会报很多的“EXP-00091: Exporting questionable statistics”错误,
处理方式如下：
1.问题现象
[Oracle@node1]$ exp test/test file=/home/oracle/test20141104.dmp log=/home/oracle/test20141104.log buffer=67108864
……忽略……
EXP-00091: Exporting questionable statistics.
EXP-00091: Exporting questionable statistics.
EXP-00091: Exporting questionable statistics.
. . exporting table test 12 rows exported
EXP-00091: Exporting questionable statistics.
. . exporting table users 129 rows exported
EXP-00091: Exporting questionable statistics.
EXP-00091: Exporting questionable statistics.
EXP-00091: Exporting questionable statistics.
EXP-00091: Exporting questionable statistics.
……忽略……
2.处理方法
指定Linux系统的NLS_LANG环境变量为数据库的数据集
1）查询数据库的字符集（方法很多只用一种）
SQL> select userenv('language') from dual;
USERENV('LANGUAGE')
----------------------------------------------------
AMERICAN_AMERICA.WE8ISO8859P1
2）设置Linux操作系统的NLS_LANG环境变量
[oracle@node1]$ $export NLS_LANG=AMERICAN_AMERICA.WE8ISO8859P1
Window系统的环境变量的修改方法是：
C:\>set NLS_LANG=AMERICAN_AMERICA.WE8ISO8859P1
3.OK，处理完成，在进行EXP导出操作就不会报这个错误了.
Oracle EXP导出报错EXP-00091分析解决
探索Oracle之 EXP/IMP过程中的字符集问题
Oracle EXP imp备份、恢复表空间数据步骤
Oracle 创建自动执行的EXP任务
Oracle 11g 导出表报EXP-00011：table不存在
EXP/imp导出导入数据时报错ORA-12154 无法解析指定的连接标识符
本文永久更新链接地址：
Oracle RAC 中vip网关引起错误的解决
GoldenGate 指定时间点重新抽取事务变化
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