Step by Step oracle 12c R2 installation on windows

System requirements

Minimum 2GB of  RAM.

Minimum 10GB of free disk space.

Sufficient virtual memory or SWAP.

If your machine doesn't meet the above requirements then error messages will be displayed while installing the software. Oracle universal installer (OUI) performs several preinstallation checks before the installation starts. Make sure that the machine meets the above requirements and then start the installation.

oracle database 12c

Required Softwares

Oracle Database 12c r2 from this link  http://www.oracle.com/technetwork/database/enterprise-edition/downloads/oracle12c-windows-3633015.html . You must accept the licence agreement and click on winx64_12201_database.zip to download the software.

Unzip the downloaded file to a directory. Unzipped files are shown as

Installing the Oracle database software

Double click on the setup file and when prompted as shown below then click YES to continue the installation.

The OUI will check the prerequisites as shown belo.This may take few seconds.

A window with configure security updates will appear. If you wish to receive security issue notifications through email then enter your My Oracle support email id and password. 

If you don't want to receive notifications via email then unselect the box " I wish to receive security updates via My Oracle Support." and click NEXT. 

When prompted as below click on YES  to proceed.

The next window appears as shown below

Select installation option:
Create and configure database:-  This option will create and configure the database, whereas it installs the Oracle software, creates the database and configures required options like the listener, OEM, Default directories, parameter files, network tns, password file, etc..

Install database software only:- This option will install only software and no other configurations will be done. For rac configuration and for other purposes this option will be used.

Upgrade existing software:- Upgradation from 11g to 12c is done by this.

Here  select the first option and click on next.

Fill up the fields for your needs.
ORACLE BASE: This is the root directory for Oracle database software
 that contains Oracle database software and other directories.
ORACLE HOME or Software location: The path where all the binaries of the software to be installed.
Database file location: This is the location of database datafiles. The data files should be inside oracle base.
Password:  Here I used "sys". You can use any other passwords.
Then click NEXT.

If your password doesn't comply oracle standards, the above warning will be shown. Click on yes to continue.

Here is the details of the installation details and database information. You can still edit as for your needs. Click on install to continue the installation.

Prechecks is done to verify the given configurations meets the requirements for Oracle installation.

After the pre-checks, installation starts automatically. This process will take some time.

As of above image, Oracle database is successfully installed, and the given URL is the Oracle enterprise manager(OEM). Run that URL in your browser to access your database in GUI.