Install Multiple Oracle Database Versions on Same Server under the same user

Requirement install the oracle 11.2.0.3 on the server on which oracle 10.2.0.3 was already installed.

There were two options one is to create the different user at OS level & install the Oracle 11g, Other is to install the Oracle 11g under

the same user with Oracle 10g installed,

I have tried the 2nd option, but there was issue of the profile at the time of version selection, so i have created the script which will run

at the user (ORACLE USER) logon which will ask which version you have to select, so that oracle will login to perticular version which is selected e.g.

Enter your choice

For oracle 10g enter 1

oracle 11g enter 2

We can create this by writing the shell script,

Below i have to select the Oracle 10g, I have selected option 1.

It will run oracle10g profile.

Next, If i have to select the oracle 11g, we will select the option 2,

This will login to oracle11g profile.

Following is the script for the above automation.

. .bash_profile

PATH=/usr/bin:/etc:/usr/sbin:/usr/ucb:$HOME/bin:/usr/bin/X11:/sbin:.

export PATH

export HOST=$(hostname)

export PS1=’$USER@$HOST:$PWD]’

export EDITOR=vi

if [ -s “$MAIL” ]           # This is at Shell startup.  In normal
then echo “$MAILMSG”        # operation, the Shell checks
fi                          # periodically.

echo “ “
echo “ “
echo “            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~”
echo “                                   Database options”
echo “ “
echo “ “
echo “                          1)  DATABASE 10g”
echo “ “
echo “                          2)  DATABASE 11g”
echo “ “
echo “            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~”
echo “ “
echo “ “
echo “                    Enter Choice:\c”
read env
if [ $env -eq 1 ] ; then
    export ORACLE_HOME=/u01/apps/oracle/product/10.2.0/db_1
    export ORACLE_BASE=/u01/apps/oracle
    export EPC_DISABLE=true
    AIXTHREAD_SCOPE=S; export AIXTHREAD_SCOPE

else
    if [ $env -eq 2 ] ; then
    export ORACLE_HOME=/u01/apps/oracle/11.2.0.3
    export ORACLE_BASE=/u01/apps/oracle/
    export EPC_DISABLE=true
    AIXTHREAD_SCOPE=S; export AIXTHREAD_SCOPE
    fi

fi

export EPC_DISABLE=true
#export ORACLE_HOME=/u01/apps/oracle/product/10.2.0/db_1
PATH=$ORACLE_HOME/bin:$PATH; export PATH
export LD_LIBRARY_PATH=$ORACLE_HOME/lib
export ORACLE_CLASSPATH=$ORACLE_HOME/jdbc/lib/classes12.jar

export NLSPATH=/usr/lib/nls/msg/%L/%N:/usr/lib/nls/msg/%L/%N.cat
export ADM=/apps/oracle/admin

AIXTHREAD_SCOPE=S; export AIXTHREAD_SCOPE

set -o vi

echo “
echo “
clear
echo