Amazon Relational Database Service (Amazon RDS) is a web service that makes it easy to set up, operate, and scale a relational database in the cloud.
With ElastiCube Manager you can easily connect to your Amazon RDS instances.
Amazon RDS supports instances with MySQL, Oracle and SQL Server databases. You can connect to those instances in the same manner as connecting to those databases on premise, with the IP and credentials as supplied by Amazon. Follow these instructions depending on your RDS type:

Connecting to Amazon RDS with MySQL
Connecting to Amazon RDS with Oracle
Connecting to Amazon RDS with SQL Server