oracle 的命令集（一）
1.数据导出导入命令：exp、imp、expdp、impdp
exp win/****grants=y file=c:\win.dmp
imp system/****file= fromuser= touser=
imp win/**** file=
import data from a server to another server
imp system/**** file=c:\win1.dmp fromuser=win touser=win
expdp/impdp
expdp system/****dumpfile=wintest1029.dmp directory=dumpdir schemas=win
impdp system/****directory=dumpdir dumpfile=wintest1029.dmp remap_schema=win:wintest
若导出导入的数据库版本不一样，要加上参数version
expdp system/****dumpfile=wintest1029.dmp directory=dumpdir schemas=win version=11.1
impdp system/****directory=dumpdir dumpfile=wintest1029.dmp remap_schema=win:wintest version=11.1
其中dumpdir需要创建
--create directory
connect system/****as sysdba;
create directory win.dumpdir as 'D:\versiondata';
GRANT READ, WRITE ON DIRECTORY dumpdir TO win;
2.ORA-28002: The password will expire within %s days
ERROR:
ORA-28002: the password will expire within 6 days
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提示密码快过期了，由于需要连接的测试数据库，所以决定将密码设置成永不过期。
1.查看用户的profile设置：
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SQL> SELECT username,profile FROM dba_users where username like 'TEST1';
USERNAME PROFILE
------------------------------ ------------------------------
TEST1 DEFAULT
========================================================
一般用户的profile设置都为DEFAULT。
2.查看系统profiles中PASSWORD_LIFE_TIME设置。
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SQL> SELECT * FROM dba_profiles s WHERE s.profile='DEFAULT' AND resource_name='P
ASSWORD_LIFE_TIME';
PROFILE RESOURCE_NAME RESOURCE LIMIT
------------------------------ -------------------------------- ------------------------------------------------
DEFAULT PASSWORD_LIFE_TIME PASSWORD 180dys
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3.修改DBA_PROFILES中PASSWORD_LIFE_TIM的设置，改为ULIMITED。
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ALTER PROFILE DEFAULT LIMIT PASSWORD_LIFE_TIME UNLIMITED;
=================================================================
修改后设置立即生效，不需要重启数据库，此时密码永远不会过期。
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