What does Amazon RDS primarily support?

Amazon RDS, which stands for Amazon Relational Database Service, primarily supports relational databases. This service is designed to streamline the setup, operation, and scaling of relational databases in the cloud, providing a managed environment for databases that follow a structured query language (SQL) format.

Relational databases organize data into tables, where each table consists of rows and columns. This allows for relationships among the tables, providing powerful querying capabilities and maintaining data integrity through features like foreign keys and transactions. Amazon RDS supports several database engines, including MySQL, PostgreSQL, SQL Server, MariaDB, and Oracle, all of which function under the relational database paradigm.

Other types of databases, such as document, graph, or in-memory databases, do not fall under the category of relational databases. Document databases manage data in document formats, graph databases specialize in interconnected data structures, and in-memory databases emphasize performance by storing data in RAM. Therefore, while those database types serve important roles in specific applications, they are not the primary focus of Amazon RDS, which is dedicated to relational database management.