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Oraworld
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 Installing Oracle 8i and 10g on Same machine
Oracle, Windows
I want to Install Oracle 8i and Oracle 10g on Same machine. Which version of Oracle to install first? Is there any precedence of installing different versions of Oracle on same machine? If the precedence change, will it cause any problem? Kindly Suggest. Thanks in advance, Karthik

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ASKED: February 24, 2006  1:50 AM
UPDATED: August 29, 2010  7:34 AM
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Install 8i first. When you install 10g, it should install into its own home. The main point is that while the 10g client will talk to both 10g and 8i, the 8i won't necessarily play nice with the 10g.
Last Wiki Answer Submitted:  February 24, 2006  6:44 am  by  Tjones   180 pts.
All Answer Wiki Contributors:  Tjones   180 pts.
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Dosesn’t matter, because you have to install Oracle different version in different ORACLE_HOME directory. So, if you work on unix platform, you have set your path to different ORACLE_HOME directory. That can be done on .profile.
One suggestion that will only install the software only, and than you can create database late.

-:?

NewTon64
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You should install 8i first because there are some shared files like the oraenv or coraenv files. There are a few others depending on your installation. the oraenv and coraenv are pretty easy to work around but it if you have a choice install 8i then 10g so that way you have less chance of issues with crossover. Oracle is pretty good at backward compatibility.

Sequential
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