Azure SQL Database is a fully managed platform-as-a-service (PaaS) built for modern cloud-native applications. Azure SQL Managed Instance is also fully managed but designed for organizations migrating existing SQL Server workloads to the cloud with minimal code changes. The right choice depends on a variety of factors, including whether you are building something new or lifting an existing environment to Azure.
What is Azure SQL Database?
Azure SQL Database is a cloud-native relational database service built on the SQL Server engine. It is optimized for new application development, offering automatic scaling, built-in high availability, and a serverless compute option. It does not support all SQL Server features but covers the vast majority of use cases for modern application workloads.
What is Azure SQL Managed Instance?
Azure SQL Managed Instance is a fully managed SQL Server instance deployed in Azure, with near-complete compatibility with on-premises SQL Server. It supports features like SQL Server Agent, cross-database queries, linked servers, and CLR. These factors make it the preferred choice for organizations migrating legacy workloads without refactoring applications.
What is the main difference between Azure SQL Database and Managed Instance?
The core difference is scope and compatibility. Azure SQL Database is a single-database service optimized for the cloud, while Managed Instance delivers a full SQL Server instance with broad feature parity to on-premises deployments. Managed Instance sits inside a virtual network and supports instance-level features that Azure SQL Database does not.
Which option is better for migrating an on-premises SQL Server?
Azure SQL Managed Instance is almost always the better fit for lift-and-shift migrations from on-premises SQL Server. Its high compatibility with SQL Server means fewer application changes and a lower-risk migration path. Azure SQL Database is better suited for net-new applications or workloads that have already been refactored for the cloud.
When should you choose Azure SQL Database?
Azure SQL Database is the right choice when you are building a new application in the cloud, need elastic scaling or serverless compute, or want to minimize administrative overhead. It works well for SaaS applications, microservices architectures, and workloads that do not rely on instance-level SQL Server features.
When should you choose Azure SQL Managed Instance?
Choose Managed Instance when you are migrating an existing SQL Server environment and need features like SQL Agent jobs, cross-database transactions, native backup and restore, or linked servers. It is also the better option when your application was built against a specific version of SQL Server and you want to preserve that compatibility without rewriting code.
Can Solvaria help us choose and implement the right Azure SQL deployment?
Yes. Solvaria’s Azure Cloud Managed Services team works with organizations at every stage of Azure adoption, from evaluating deployment options to managing production environments after migration. We help you make the right architectural decision up front and support your team through implementation and beyond.