在session4的4小题需要用到SH.COUNTRIES表，而手工建库时，这个SH用户没有这个表，就想着将别处的这个表拷贝过来。
原来导出表的库：database ORACLE_SID=TEST0221 版本： 11.2.0.4
需要导进的库：database ORACLE_SID=PROD 版本：10.2.0.1
因为字符集的问题，出现了EXP-00091的错误
因为数据库版本的问题，出现了IMP-00010的错误
[oracle@node2 ~]$ exp sh/sh@test0221 tables=COUNTRIES rows=y file=COUNTRIES.dmp
Export: Release 11.2.0.4.0 - Production on Thu Mar 27 15:19:07 2014
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Export done in US7ASCII character set and AL16UTF16 NCHAR character set
server uses AL32UTF8 character set (possible charset conversion)
About to export specified tables via Conventional Path ...
. . exporting table COUNTRIES 23 rows exported
EXP-00091: Exporting questionable statistics.
EXP-00091: Exporting questionable statistics.
Export terminated successfully with warnings.
[oracle@node2 ~]$ oerr exp 00091
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.
[oracle@node2 ~]$ exit
exit
sys@TEST0221> select * from nls_database_parameters t where t.parameter='NLS_CHARACTERSET';
PARAMETER VALUE
------------------------------ -------------------------------------------------------------------
NLS_CHARACTERSET AL32UTF8
或者查看：
sys@TEST0221> select * from v$nls_parameters where parameter='NLS_CHARACTERSET';
PARAMETER VALUE
---------------------------------------------------------------- ----------------------------------------------------------------
NLS_CHARACTERSET AL32UTF8
sys@TEST0221> !
[oracle@node2 ~]$ export NLS_LANG=AMERICAN_AMERICA.AL32UTF8--设置字符集
[oracle@node2 ~]$ exp sh/sh@test0221 tables=COUNTRIES rows=y file=COUNTRIES.dmp--再来重新导出，成功
Export: Release 11.2.0.4.0 - Production on Thu Mar 27 15:22:32 2014
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Export done in AL32UTF8 character set and AL16UTF16 NCHAR character set
About to export specified tables via Conventional Path ...
. . exporting table COUNTRIES 23 rows exported
Export terminated successfully without warnings.
[oracle@node2 ~]$ ll
total 480
-rw-r--r-- 1 oracle oinstall 438823 Mar 14 13:30 awrrpt_1_33_37.html
-rw-r--r-- 1 oracle oinstall 24576 Mar 27 15:22 COUNTRIES.dmp
-rw-r--r-- 1 oracle oinstall 2992 Feb 24 23:00 login.sql
-rw-r--r-- 1 oracle oinstall 195 Mar 14 08:43 spcpkg.lis
-rw-r--r-- 1 oracle oinstall 5477 Mar 14 08:43 spctab.lis
-rw-r--r-- 1 oracle oinstall 1832 Mar 14 08:43 spcusr.lis
[oracle@node2 ~]$ scp COUNTRIES.dmp 192.168.1.155:/home/oracle--- 使用scp将文件传输到需要导入的库的系统里
oracle@192.168.1.155's password:
COUNTRIES.dmp 100% 24KB 24.0KB/s 00:00
[oracle@node2 ~]$
在需要导入表的环境里查看刚scp传输过来的文件：
[oracle@ocm1 ~]$ ll
total 32
-rw-r--r-- 1 oracle oinstall 24576 Mar 27 15:26 COUNTRIES.dmp
drwxr-xr-x 2 oracle oinstall 4096 Mar 27 12:39 script
drwxr-xr-x 2 oracle oinstall 4096 Mar 19 14:51 temp
#####################################################################
下面是导入：
[oracle@ocm1 ~]$ imp
Import: Release 10.2.0.1.0 - Production on Thu Mar 27 15:31:30 2014
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Username: sh
Password:
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
Import file: expdat.dmp > /home/oracle/COUNTRIES.dmp
Enter insert buffer size (minimum is 8192) 30720>
IMP-00010: not a valid export file, header failed verification
IMP-00000: Import terminated unsuccessfully
[oracle@ocm1 ~]$
头部验证失败是由于版本号不同所致，经试验可以通过如下方法进行修改：
可以看到头部信息 －－TEXPORT:V11.01.00，即为源数据库的版本号，将其修改为目的数据库的版本号，如本机为10.02.01，再次进行导入操作，导入成功
[oracle@ocm1 ~]$ vi COUNTRIES.dmp --直接使用vi修改下头部的版本号即可
^C^CiEXPORT:V10.02.00--之前是EXPORT:V11.02.00
USH
再次导入，成功：
[oracle@ocm1 ~]$ imp
Import: Release 10.2.0.1.0 - Production on Thu Mar 27 15:36:22 2014
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Username: sh
Password:
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
Import file: expdat.dmp > /home/oracle/COUNTRIES.dmp
Enter insert buffer size (minimum is 8192) 30720>
Export file created by EXPORT:V10.02.00 via conventional path
import done in AL32UTF8 character set and AL16UTF16 NCHAR character set
List contents of import file only (yes/no): no >
Ignore create error due to object existence (yes/no): no >
Import grants (yes/no): yes >
Import table data (yes/no): yes >
Import entire export file (yes/no): no >
Username: sh
Enter table(T) or partition(T:P) names. Null list means all tables for user
Enter table(T) or partition(T:P) name or . if done:
. importing SH's objects into SH
IMP-00008: unrecognized statement in the export file:
. importing SH's objects into SH
. . importing table "COUNTRIES" 23 rows imported
Import terminated successfully with warnings.
[oracle@ocm1 ~]$
SYS@PROD> conn sh/sh
Connected.
SH@PROD> desc COUNTRIES
Name Null? Type
----------------------------------------- -------- ----------------------------
COUNTRY_ID NOT NULL NUMBER
COUNTRY_ISO_CODE NOT NULL CHAR(2)
COUNTRY_NAME NOT NULL VARCHAR2(40)
COUNTRY_SUBREGION NOT NULL VARCHAR2(30)
COUNTRY_SUBREGION_ID NOT NULL NUMBER
COUNTRY_REGION NOT NULL VARCHAR2(20)
COUNTRY_REGION_ID NOT NULL NUMBER
COUNTRY_TOTAL NOT NULL VARCHAR2(11)
COUNTRY_TOTAL_ID NOT NULL NUMBER
COUNTRY_NAME_HIST VARCHAR2(40)
SH@PROD>
SH@PROD> select count(*) from COUNTRIES;
COUNT(*)
----------
23