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Compare SQL data migration tools

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Microsoft provides a suite of tools and services to assist users with migrating various source databases to different target environments.

This article briefly overviews the tools available to migrate to SQL Server and Azure SQL.

Azure Database Migration Service (DMS)

Azure Database Migration Service enables seamless migrations from SQL Server database sources to Azure SQL offerings with minimal downtime. The Database Migration Service provides a resilient and reliable migration pipeline that requires minimal user involvement during the overall migration process.

With Azure Database Migration Service currently we offer two versions:

  1. Azure Database Migration Service can be accessed via Azure SQL Migration extension for Azure Data Studio, Azure portal, PowerShell and Azure CLI.

Use the latest Azure Database Migration Service in the following scenarios:

  • Migrate both databases to Azure SQL, especially at scale, and for extensive (in terms of number and size of databases) migrations.
  • Migrate databases to Azure Database.
  1. Azure Database Migration Service (classic) can be accessed via Azure portal, PowerShell and Azure CLI. It is an older version of the Azure Database Migration Service that offers database modernization to Azure and support scenarios like - PostgreSQL, MySQL, and MongoDB.

Бележка

DMS(classic) - SQL scenario are on the deprecation path. Refer here

For more information, visit Azure Database Migration Service documentation.

Azure Migrate

Azure Migrate provides a centralized hub to discover and assess on-premises servers, infrastructure, applications, and data to Azure at scale. Azure Migrate offers a unified migration across your servers, databases, and applications.

Use Azure Migrate to discover all your SQL Server instances across your datacenter, assess application dependencies, understand the readiness of these SQL Server instances migrating to Azure SQL, and get Microsoft recommendations, such as the optimal Azure SQL deployment option and the correct SKU that can fit the performance needs for your workloads. You can also get the monthly estimates running these databases on Azure SQL to cater to your licensing benefits.

Use Azure Migrate in the following scenarios:

  • Assess and discover your SQL Server data estate.
  • Get Azure SQL deployment recommendations, target sizing, and monthly estimates.
  • Lift your entire data estate to SQL Server on Azure VMs.

For more information, visit Azure Migrate documentation.

Data Migration Assistant (DMA)

The Data Migration Assistant (DMA) helps you upgrade to a modern data platform by detecting compatibility issues that can impact database functionality in your new version of SQL Server or Azure SQL Database. DMA recommends performance and reliability improvements for your target environment and allows you to move your schema, data, and uncontained objects from your source server to your target server.

Use DMA in the following scenarios:

  • Upgrade of SQL Server 2005 and later versions to SQL Server 2012, SQL Server 2014, SQL Server 2016, SQL Server 2017 and later on Windows and Linux, and SQL Server on Azure VM.
  • Detect compatibility issues that can impact database functionality on a newer target version of SQL Server or Azure SQL and provide mitigating steps.
  • Move the schema, data, and uncontained objects from a source server to SQL Server or Azure SQL.

For more information, visit Data Migration Assistant documentation.

SQL Server Migration Assistant (SSMA)

SQL Server Migration Assistant (SSMA) is a tool designed to automate database migration to SQL Server and Azure SQL from alternative database engines.

Use SSMA in the following scenario:

  • Migrate Microsoft Access, DB2, MySQL, Oracle, and SAP ASE databases to SQL Server.
  • Migrate Microsoft Access, DB2, MySQL, Oracle, and SAP ASE databases to Azure SQL.

For more information, visit SQL Server Migration Assistant documentation.

Quick comparison

Use the following chart to compare capabilities of the SQL migration tools:

Capability Azure Migrate DMA SSMA DMS(classic) Azure Data Studio extension (DMS)
Discover and assess SQL data estate At scale Yes No No Yes
Migrate SQL Server objects to SQL Database or SQL Managed Instance No Yes No NA (deprecated) Yes
Lift and shift SQL Server to SQL Server on Azure VM Yes No No No No
Migrate (and/or upgrade) SQL Server to SQL Server on Azure VM No Yes No No Yes (Migrate only)
Migrate non-SQL objects
(Oracle, Access, DB2, and so on)		 No No Yes No No
Migrate open source databases
(MySQL, PostgreSQL, MariaDB, and so on)		 No No No Yes No

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