Migrate Data to Azure SQL Database
This tutorial guides you through the process of migrating your on-premises SQL Server databases to Azure SQL Database. Learn various methods and best practices to ensure a smooth and efficient data migration.
Prerequisites: Ensure you have an Azure subscription and an existing on-premises SQL Server instance with a database to migrate.
Migration Methods
1. Using Azure Data Migration Assistant (DMA)
DMA helps you assess your databases for compatibility with Azure SQL Database and provides recommendations. It also facilitates the migration of your database schema and data.
Steps:
- Download and install Azure Data Migration Assistant.
- Create a new assessment project to identify compatibility issues.
- Create a new migration project and select your source and target.
- Perform schema migration.
- Perform data migration.
Learn more about DMA
2. Using Azure Database Migration Service (DMS)
DMS is a fully managed service designed to enable seamless migrations from multiple database sources to Azure data platforms with minimal downtime.
Steps:
- Create an Azure Database Migration Service instance.
- Create a migration project within DMS.
- Configure source and target database connections.
- Select tables and configure migration settings.
- Start and monitor the migration process.
Learn more about DMS
3. Using Backup and Restore (for Azure SQL Managed Instance)
If you are migrating to Azure SQL Managed Instance, you can leverage the traditional backup and restore method using .bak files.
Steps:
- Create a full backup of your on-premises database.
- Upload the backup file to Azure Blob Storage.
- Use T-SQL commands to restore the database from the URL to your Azure SQL Managed Instance.
-- Example T-SQL for restore to Managed Instance
RESTORE DATABASE [MyMigratedDB]
FROM URL = 'https://[storageaccount].blob.core.windows.net/[container]/[backupfile].bak'
WITH MOVE '[logical_data_file_name]' TO 'master.ldf', MOVE '[logical_log_file_name]' TO 'log.ldf';
Best Practices for Data Migration
- Assess Readiness: Thoroughly assess your source database for compatibility issues before migration.
- Choose the Right Method: Select the migration method (DMA, DMS, backup/restore) that best suits your downtime tolerance and database size.
- Test Thoroughly: Perform pilot migrations and extensive testing of your applications against the migrated database in Azure.
- Monitor Performance: Continuously monitor the performance of your database and applications post-migration.
- Secure Your Data: Implement appropriate security measures for your Azure SQL Database, including network security and access control.
Additional Resources
Next Steps
Once your data is successfully migrated, consider optimizing your Azure SQL Database for performance and cost, and securing your database environment.