Different ORACLE_HOME

Hi,
I have an Oracle database on my Windows machine. I want to create by DBCA another data base in another ORACLE_HOME . Now when I launch DBCA I have the old ORACLE_HOME. What should I do before to have another ORACLE_HOME in DBCA ?
Many thanks.

A few concepts:
1) ORACLE_HOME is where the software is installed.
You can have multiple ORACLE_HOMEs on a computer. EAch ORACLE_HOME represents a specific combination of software that needs to be maintained and patched.
You only want to create additional ORACLE_HOMEs when you have a need to for multiple versions of the software. For example, a copy of the software that will be patched for test purposes, or because you need to manage a different service level agreement, or ...
Oracle also has Grid Control, App Server, Dev Tools, each that should have it's own ORACLE_HOME.
2) ORACLE_SID represents an ORACLE database and a specific instance accessing that database.
You can have any number of ORACLE databases being run from one ORACLE_HOME. The kicker is that the all get Oracle patches at the same time. (Or at least need to be scheduled for shutdown/upgrade/patches at the same time.)
3) People coming from some other rdbms get confused about the definition of 'database'. Especially confusing for those coming from SQL Server, MS Access or FoxPro.
Those people often (usually) want to create a new schema, not a new database.
An ORACLE Schema is a database user, with privilege to create objects such as tables, as well as the collection of named objects (tables, views, indexes, triggers, etc.) owned and maintained by that user.
DBCA is one of the pieces of software that you will find in the database ORACLE_HOME. When you run DBCA, it assumes you want to do something like create a database to be run by the software found in the same ORACLE_HOME as the DBCA. (If you install 3 database ORACLE_HOMEs, you will have 3 DBCAs, one per home.)
On one of the first screens in DBCA, you would set the SID (aka database name), but rarely would you reset the ORACLE_HOME, as the DBCA is tied to the software level in the ORACLE_HOME.
HTH/Hans

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    My question:
    o Is ORACLE Client 8.1.7 compatible with Dev/6i ?
    o If yes, how do I have to install the software?
    o If not, Do I have to use a different developer version? Which
    version?
    By the way:
    Got this Error on Windows/NT and Windows2000

    you can not install Oracle8.1.7 and Forms6i in the same
    oracle_home.
    So, install it into a different ORACLE_HOME (directory) on the
    same machine.

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