Before You Begin

Select the Oracle Database release:

This 15-minute tutorial shows you how to keep your Oracle Database software up-to-date.

What Do You Need?

• Oracle Database 18c19c

Uninstall Oracle Database

If you want to remove an Oracle software installation, you can use the deinstallation tool to completely uninstall the software from your computer.

1. Log on to your computer as a member of the administrative group that is authorized to deinstall Oracle Database software.
2. Open a terminal and change the current working directory to ORACLE_HOME. The ORACLE_HOME is by default set to your installation directory.

   $ export ORACLE_HOME=/scratch/u01/app/oracle/product/18.0.0/dbhome_1
   $ cd $ORACLE_HOME

   $ export ORACLE_HOME=/scratch/u01/app/oracle/product/19.0.0/dbhome_1
   $ cd $ORACLE_HOME

3. Invoke the deinstallation tool by using this command:

   $ $ORACLE_HOME/deinstall/deinstall

   
   OUTPUT:

   Checking for required files and bootstrapping ...
   Please wait ...
   Location of logs /tmp/deinstall2019-05-05_09-32-20AM/logs/
   
   ############ ORACLE DECONFIG TOOL START ############
   
   ######################### DECONFIG CHECK OPERATION START #########################
   ## [START] Install check configuration ##
   
   Checking for existence of the Oracle home location /scratch/u01/app/oracle/product/18.0.0/dbhome_1/scratch/u01/app/oracle/product/19.0.0/dbhome_1
   Oracle Home type selected for deinstall is: Oracle Single Instance Database
   Oracle Base selected for deinstall is: /scratch/u01/app/oracle
   Checking for existence of central inventory location /scratch/u01/app/oraInventory
   
   ## [END] Install check configuration ##
   
   Network Configuration check config START
   
   Network de-configuration trace file location: /tmp/deinstall2016-05-05_09-32-20AM/logs/netdc_check2016-05-05_09-33-05-AM.log

4. In the terminal, when prompted to enter the instance listeners that you want to de-configure, accept the default value by pressing Enter.

   Specify all Single Instance listeners that are to be de-configured. Enter .(dot) to deselect all. [LISTENER]: Enter

   
   OUTPUT:

   Network Configuration check config END
   
   Database Check Configuration START
   
   Database de-configuration trace file location: /tmp/deinstall2019-05-05_09-32-20AM/logs/databasedc_check2019-05-05_09-35-32-AM.log

5. In the terminal, when prompted to enter the database names that are configured in this Oracle home, accept the default value by pressing Enter.

   Use comma as separator when specifying list of values as input
   Specify the list of database names that are configured in this Oracle home [orcl]: Enter

   
   OUTPUT:

   ###### For Database 'orcl' ######
   
   Single Instance Database
   The diagnostic destination location of the database: /scratch/u01/app/oracle/diag/rdbms/orcl
   Storage type used by the Database: FS
   Database file location: /scratch/u01/app/oracle/oradata/orcl,/scratch/u01/app/oracle/recovery_area/orcl
   Fast recovery area location: /scratch/u01/app/oracle/recovery_area/ORCL
   database spfile location: /scratch/u01/app/oracle/product/18.0.0/dbhome_1/dbs/spfileorcl.ora/scratch/u01/app/oracle/product/19.0.0/dbhome_1/dbs/spfileorcl.ora
                   

6. In the terminal, when prompted to modify the details of the discovered database, accept the default by pressing Enter.

   The details of database(s) orcl have been discovered automatically. 
   Do you still want to modify the details of orcl database(s)? [n]: Enter

   
   OUTPUT:

   Database Check Configuration END
   Oracle Configuration Manager check START
   OCM check log file location : /tmp/deinstall2019-05-05_09-32-20AM/logs//ocm_check8037.log
   Oracle Configuration Manager check END
   
   ######################### DECONFIG CHECK OPERATION END #########################
   
   ####################### DECONFIG CHECK OPERATION SUMMARY #######################
   Oracle Home selected for deinstall is: /scratch/u01/app/oracle/product/18.0.0/dbhome_1/scratch/u01/app/oracle/product/19.0.0/dbhome_1
   Inventory Location where the Oracle home registered is: /scratch/u01/app/oraInventory
   Following Single Instance listener(s) will be de-configured: LISTENER
   The following databases were selected for de-configuration : orcl
   Database unique name : orcl
   Storage used : FS
   Checking the config status for CCR
   Oracle Home exists with CCR directory, but CCR is not configured
   CCR check is finished

7. In the terminal, enter y, when asked if you want to continue.

   Do you want to continue (y - yes, n - no)? [n]: y

   Open output.txt to view the output.txt.
8. The Oracle software is successfully uninstalled.