Azure Database Migration Service enables migration to Azure SQL with assessment tools and minimal-downtime online migration. Pricing: Standard tier free for online migrations to Azure SQL targets; Premium tier for MongoDB and PostgreSQL migrations at ~$0.40/vCore/hour. Azure Migrate provides discovery and assessment across on-premises SQL Server estates. Data Migration Assistant (DMA) assesses SQL Server database compatibility with target Azure SQL services, identifying blocking issues, behavior changes, and deprecated features. Azure SQL Migration extension for Azure Data Studio provides guided migration experience with Azure recommendations. For SQL Server migrations: tooling is mature with high automation. For other sources: relies more on third-party tools. Assessment reports estimate Azure SQL costs and recommend service tiers based on workload analysis. Page should cover: assessment tools comparison (DMA, Azure Migrate), online vs offline migration paths, supported sources and targets, Azure SQL target selection guidance, comparison with AWS DMS, and migration project planning.