EXP,IMP导数据时,导出时操作系统的字符集与数据库的NLS_CHARACTERSET 字符语言不一致时会报EXP-00091.可以先查出数据库的NLS_CHARACTERSET ,在操作系统上set/export NLS_LANG 再导就不会出这个问题了
---please set NLS_LANG before IMP/DMP
1.first ,select NLS_CHARACTERSET from database
sql>conn /as sysdba
SQL> select * from props$;
NAME
------------------------------------------------------------
VALUE$
--------------------------------------------------------------------------------
COMMENT$
--------------------------------------------------------------------------------
NLS_NUMERIC_CHARACTERS
.,
Numeric characters
NLS_CHARACTERSET
ZHS16CGB231280
Character set
2.set NLS_LANG value in OS:
in AIX:
export NLS_LANG=AMERICAN_AMERICA.ZHS16CGB231280
in windows:
c:> set NLS_LANG=AMERICAN_AMERICA.ZHS16CGB231280
3.exp or imp your data .
exp user/password@sid file=E:\dnft_ora_back\ddd.dmp log=E:\dnft_ora_back\ll.log wner=llconsistent=Y
exp user/password@sid file=/oradata/II.dmp log=/oradata/ddd.log wner=llconsistent=Y
imp user/password@sid fromuser=ll touser=ll file=z:\ll.dmp log=z:\llimp.log
oerr exp 91
00091, 00000, "Exporting questionable statistics."
// *Cause: Export was able export statistics, but the statistics may not be
// usuable. The statistics are questionable because one or more of
// the following happened during export: a row error occurred, client
// character set or NCHARSET does not match with the server, a query
// clause was specified on export, only certain partitions or
// subpartitions were exported, or a fatal error occurred while
// processing a table.
// *Action: To export non-questionable statistics, change the client character
// set or NCHARSET to match the server, export with no query clause,
// export complete tables. If desired, import parameters can be
// supplied so that only non-questionable statistics will be imported,
// and all questionable statistics will be recalculated.
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