How to migrate SQL Server database to Azure SQL Server database

Migrating a SQL Server database to Azure SQL Database involves several steps. Here's a general outline of the process:

1. Assessment and Planning:

   • Evaluate your SQL Server database schema, features, and dependencies to determine compatibility with Azure SQL Database.
   • Use tools like Data Migration Assistant (DMA) or Azure Database Migration Service (DMS) to assess the readiness of your database for migration and identify any issues or compatibility issues.

2. Prepare Azure Resources:

   • Create an Azure SQL Database server and database in the Azure portal. Choose the appropriate service tier and pricing tier based on your requirements.

3. Database Schema and Objects Migration:

   • Generate a schema script for your SQL Server database using SQL Server Management Studio (SSMS) or another tool.
   • Modify the schema script to ensure compatibility with Azure SQL Database. For example, review data types, unsupported features, and permissions.
   • Execute the modified schema script against the Azure SQL Database to create the schema and objects.

4. Data Migration:

   • Use tools like SQL Server Management Studio (SSMS), SQL Server Integration Services (SSIS), or Azure Data Factory to migrate data from the SQL Server database to Azure SQL Database.
   • You can also use Azure Database Migration Service (DMS) for online or offline data migration with minimal downtime.

5. Application Configuration Update:

   • Update your application connection strings and configurations to point to the new Azure SQL Database server.
   • Test the connectivity and functionality of your application against the Azure SQL Database.

6. Testing and Validation:

   • Perform thorough testing to ensure that data, schema, and application functionality are migrated successfully.
   • Validate performance and scalability of Azure SQL Database compared to your SQL Server environment.

7. Monitoring and Optimization:

   • Configure monitoring and alerting for your Azure SQL Database using Azure Monitor.
   • Optimize database performance and scalability based on usage patterns and workload.

8. Post-Migration Cleanup:

   • Decommission the old SQL Server database and associated resources if they are no longer needed.
   • Review and update documentation, including backup and recovery procedures.

Throughout the migration process, it's essential to involve stakeholders, communicate effectively, and have a rollback plan in case any issues arise. Additionally, consider best practices for security, compliance, and governance when migrating to Azure SQL Database.