How to create database link in oracle 11gr2

                                 Database link Details:

Database link is a schema object in one database which enables us to access objects

 on another databases.And the other databases not need to be an Oracle Database

 system.But here, to access non-Oracle systems we should use Oracle different 

Services.

Requirements for Installing Oracle 11.2.0.4 RDBMS on OL7 or RHEL7 64-bit (x86-64) (Doc ID 1962100.1)

In this Document Purpose Scope Details References APPLIES TO: Oracle Database - Standard Edition - Version 11.2.0.4 to 11.2.0.4 [Release 11.2] Oracle Database - Enterprise Edition - Version 11.2.0.4 to 11.2.0.4 [Release 11.2] Linux x86-64 PURPOSE This note explains the requirements that need to be met for a successful installation of Oracle 11gR2 RDBMS release 11.2.0.4 on Red Hat Enterprise Linux 7.0 (or higher 7.x version), 64-bit (x86-64).  These guidelines apply to cluster (RAC) or standalone / single instances. It is NOT the purpose of this NOTE to repeat every "how-to" step that is presented in the 11gR2 Installation Guide manual. For example this NOTE does not include how to create the Linux OS account named "oracle", nor does it cover how to set environment variables. Both are adequately covered in Chapter 2 "Oracle Database Pre-installation Requirements" of the 11gR2 Installation Guide manual.

Clone a Database to Another Host using Enterprise Manager 11gR1 Grid Control

This document will detail the steps to clone a database to another host using Oracle Enterprise Manager 11gR1 Grid Control.

Licensing Note: To make use of the Database Clone functionality present in Oracle Enterprise Manager Grid Control you have must have a license for the Database Provisioning and Patch Automation Pack.