Microsoft has introduced online migration for its Azure Database for PostgreSQL Flexible Server, enabling organizations to transition their databases with minimal downtime. This feature supports various sources, including on-premises PostgreSQL, Azure VMs, Amazon RDS, Aurora, and Google Cloud SQL, and is accessible through the Azure Portal and Azure CLI. Data remains continuously synchronized between source and target servers, allowing operational continuity during migration. Users can execute a final cutover after halting write operations and validating migrated data. The online migration tool is designed for production workloads requiring high availability, while offline migration is suitable for smaller databases or testing scenarios. This enhancement allows Azure customers to modernize PostgreSQL deployments efficiently, leveraging built-in replication and automation tools to minimize manual intervention and risks.