改变数据库实例名称

    env : Windows + oracle8i
    ----------------------------------

    1.Be sure database closed.if not ,please shutdown first.

    2.利用oradim 可以创建服务，
    > ORADIM -NEW -SID newname -INTPWD pwdnewname.pwd -STARTMODE AUTO -PFILE yourpfile,then you can see the new servcie .

    3. Be sure the ORACLE_SID is set in the registry correctly. Goto
    Start button-->RUN-->type regedt32-->
    Goto the following directory tree within the registry -
    HKEY_LOCAL_MACHINE -> SOFTWARE -> ORACLE -
    highlight ORACLE - look on the left side look for ORACLE_SID = <sid>
    To change you can highlight ORACLE_SID - right click on your mouse and
    select modify.
    Enter the SID.
    The above is only valid when using DEFAULT_HOME, when you have another
    home then you need to highlight that HOME under ORACLE key
    usually HOME1-HOMEx . No spaces can be entered after the = when setting ORACLE_SID
    at the DOS Prompt, set oracle_sid=xyz should be used and not
    set oracle_sid = xyz

    4.Be sure the new instance is started Goto
    Start-->Settings-->Control Panel-->Services
    and check if the database service is started.

    5..in Command line prompt, SET ORACLE_SID=NEWNAME

    6.Startup the database ,then you can view v$instance,you will see your new instance name here.