Amazon RDS is an AWS-managed service that allows you to automatically install and provision relational databases in the AWS Cloud using popular open-source and commercial database engines:

MySQL

Microsoft SQL Server

Oracle

PostgreSQL

MariaDB and

Amazon Aurora which is a MySQL and PostgreSQL-compatible database built for the cloud by AWS.

When spinning up a new database with RDS, AWS will take care of all the typical administrative tasks (provisioning, security, high-availability, backups, patching and updating minor versions).