Relational database management systems (RDBMSs) are a core component of many web applications, providing a structured way to store, organize, and access data. Amazon Relational Database Service (Amazon RDS) makes it easy to set up, operate, and scale a relational database in the cloud. Amazon RDS provides you with six familiar database engines to choose from, including Amazon Aurora, MySQL, MariaDB, Oracle, Microsoft SQL Server, and PostgreSQL.

With Amazon RDS, you can deploy scalable relational databases in minutes with cost-efficient and resizable hardware capacity. Amazon RDS automates time-consuming administration tasks such as hardware provisioning, database setup, patching, and backups. Amazon RDS provides you with a choice of database instance types and storage options to fit the performance and cost requirements of your applications. Amazon RDS is available on Amazon Elastic Compute Cloud (Amazon EC2) and Amazon Elastic Block Store (Amazon EBS).

Amazon Aurora is a MySQL-compatible relational database engine that combines the speed and availability of high-end commercial databases with the simplicity and cost-effectiveness of open source databases.

MySQL is a fast, reliable, and secure relational database that is trusted by businesses of all sizes around the world.

MariaDB is a community-developed fork of MySQL that is fast, reliable, and secure.

Oracle Database is the world's most popular relational database and is trusted by businesses of all sizes around the world.

Microsoft SQL Server is a relational database management system (RDBMS) from Microsoft.

PostgreSQL is a powerful, open source object-relational database system with an emphasis on extensibility and standards compliance.