Oracle expʱ EXP 00091´íÎó
對Ò»個DBA»òÐèʹÓÃexp,impµÄÆÕͨÓÃ戶來說£¬ÔÚÎÒ們×öexpµÄ過³ÌÖпÉÄÜ經³£會Óöµ½EXP£00091 Exporting questionable statistics.這樣µÄEXPÐÅÏ¢£¬Æä實Ëü¾ÍÊÇexpµÄerror message£¬Ëü產ÉúµÄÔÒòÊÇÒò為ÎÒ們exp¹¤¾ßËùÔÚµÄ環¾³變Á¿ÖеÄNLS_LANG與DBÖеÄNLS_CHARACTERSET²»Ò»Ö¡£µ«Ðè說Ã÷µÄÊÇ£¬exp-91這個error message對ËùÉú³ÉµÄdump檔沒ÓÐÓ°響£¬Éú³ÉµÄdump檔還¿ÉÒÔÕý³£µÄimp£¨個ÈË體會£¬²»ÖªµÀÓÐ沒ÓÐ錯£©£¬雖È»Ëü對ÎÒ們µÄdump檔沒ÓÐÓ°響£¬ÎÒ個ÈË還ÊDz»ÏëËü³ö現£¬´ó¼ÒÒ²ÓÐͬ¸Ð°É£¬¡¡¡£¡£ÏÂÃæÎÒ們¾Í讓ËüÏûʧ°É¡£¡£ÎÒ們Ò»Æð來
step 01¡¡²é¿´DBÖеÄNLS_CHARACTERSETµÄÖµ£¨Ìṩ兩種·½·¨£©£º
select * from nls_database_parameters t where t.parameter='NLS_CHARACTERSET'
or
select * from v$nls_parameters where parameter='NLS_CHARACTERSET';
SQL> select * from v$nls_parameters where parameter='NLS_CHARACTERSET';
PARAMETER¡¡¡¡¡¡¡¡ VALUE
-----------------------¡¡¡¡----------------------------------------------
NLS_CHARACTERSET ZHT16BIG5
step 02¡¡¸ù據step 01²é³öµÄNLS_CHARACTERSET£¨ZHT16BIG5£©來設¶¨expµÄ環¾³變Á¿£º
WINNT> set NLS_LANG=AMERICAN_AMERICA.ZHT16BIG5
LINUX> export NLS_LANG=AMERICAN_AMERICA.ZHT16BIG5
¸½ÉÏexp-91µÄoracle error message ½â決·½°¸說Ã÷£º
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 matc
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