Microsoft SQL Server is a mature commercial relational database, and running it as a managed service - on Amazon RDS for SQL Server or Azure SQL - lets organizations keep the engine, the T-SQL dialect, and the tooling they've built around it while shedding the work of operating the servers. For the many enterprises with years of SQL Server investment, this is the path to the cloud that doesn't require rewriting applications.

What you keep, what you hand off

The managed service runs the real SQL Server engine, so T-SQL, stored procedures, SQL Server Agent jobs, and client drivers work as before. The provider handles backups, patching, high availability (a standby replica with automatic failover), and monitoring. What you manage is the database itself - schemas, indexes, queries, and the SQL Server-specific features your application relies on. Licensing comes along: you either pay license-included pricing or bring your own license, since SQL Server is commercial software.

RDS for SQL Server vs. Azure SQL

There are two flavors of "managed SQL Server," and they differ in how much they reimagine the engine. Amazon RDS for SQL Server is a managed instance of the standard product - close to running your own SQL Server, minus the operations. Azure SQL Database is more cloud-native: a re-engineered, always-current service that drops some instance-level features in exchange for serverless scaling, hyperscale storage, and deep Azure integration, while Azure SQL Managed Instance sits between the two for high compatibility with on-prem SQL Server. The choice hinges on how many instance-level and legacy features your workload needs.

Where it fits

Managed SQL Server is the natural choice when you already run SQL Server and want to move to the cloud without re-platforming - lift-and-shift the database, keep the application. It's a transactional (OLTP) engine, so the usual pattern holds: it serves the application, and analytics belong in a separate warehouse. For a greenfield project with no Microsoft commitment, an open-source engine like MySQL or PostgreSQL usually wins on cost and portability.

Frequently asked questions

Does managed SQL Server support T-SQL and stored procedures? Yes - it runs the genuine engine, so T-SQL, stored procedures, and SQL Server Agent work as on-prem.

What's the difference between RDS for SQL Server and Azure SQL? RDS for SQL Server is a managed instance of the standard product; Azure SQL Database is a more cloud-native, re-engineered service that trades some instance-level features for serverless scaling and Azure integration.

How does licensing work? SQL Server is commercial, so you pay license-included pricing or bring your own license.

Should a new project pick SQL Server? Usually only if it's already committed to the Microsoft stack; otherwise managed PostgreSQL or MySQL is cheaper and more portable.