How does SQL Data Migration Assistant (DMA) work?

Answered on : 2024-01-23

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Overview of Data Migration Assistant - SQL - Microsoft Learn

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Overview of Data Migration Assistant (DMA)

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Perform a SQL Server migration assessment

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SQL Data Migration Assistant (DMA) facilitates the upgrade to a modern data platform by detecting compatibility issues that may impact database functionality during various migration scenarios, such as upgrading to a new version of SQL Server, migrating to Azure SQL Database, or migrating to Azure SQL Managed Instance[1]. Here's a concise overview:

1. **Detection of Compatibility Issues**: DMA identifies potential compatibility issues that could affect the database's functionality.

2. **Migration Assessment**: It allows for on-premises SQL Server assessment before migration to another SQL Server or Azure SQL[3].

3. **Minimum Downtime Migration**: DMA supports minimum downtime migration, enabling the migration of SQL Server with reduced downtime[4].

4. **No Changes to Data Architecture**: DMA tool gathers data without affecting the underlying data architecture of the source SQL Server[5].

For detailed steps and best practices, refer to Microsoft's documentation and best practices for SQL Server database migration[1][8].