Microsoft's cloud-based relational database service that provides managed SQL Server capabilities.
Azure SQL Database automatically handles backups, updates, and scaling for your applications.
All are managed relational database services that run Microsoft SQL Server with automated patching and backups. Azure SQL Database is a PaaS offering with built-in high availability and serverless/hyperscale options, while Azure SQL Managed Instance is closer to full SQL Server instance compatibility. AWS RDS and GCP Cloud SQL provide managed SQL Server instances. OCI offers managed SQL Server via its database service.