Which AWS service is a managed relational database service that supports PostgreSQL, MySQL, and SQL Server for transactional workloads?

Amazon RDS (Relational Database Service) is a managed database service that supports several popular relational database engines, including PostgreSQL, MySQL, MariaDB, Oracle, and Microsoft SQL Server. It handles routine database administration tasks such as patching, backups, replication, and scaling, allowing developers to focus on application logic. RDS is ideal for transactional workloads that require ACID compliance, structured schemas, and SQL querying. Unlike Amazon S3, which is object storage, or DynamoDB, which is a key‑value NoSQL store, RDS provides a fully managed relational database that can be accessed via standard JDBC/ODBC drivers. For analytics workloads, Amazon Redshift would be a better fit, but for day‑to‑day transactional processing, RDS is the appropriate choice.