You can upgrade an instance from SQL Server 2012 Basic Edition to SQL Server 2016 High-availability Edition.
For details about the functional differences between different versions and editions, see Functions supported by different versions and editions of SQL Server.
For details about the billing for version upgrade, see Billing details about configuration change.
After the upgrade is completed, you must switch over services. The downtime caused by the switchover varies depending on the instance size. In most cases, switchover can be completed within 20 minutes. We recommend that you switch over services during system maintenance. Make sure each application can be reconnected in the event of disconnection.
- SQL Server 2012 Enterprise Edition
- SQL Server 2012 Web
- SQL Server 2012 Standard Edition (Basic Edition)
Your instance cannot be rolled back to SQL Server 2012 Basic Edition after the upgrade is completed.
For more information, see Upgrade from Basic Edition to High-availability Edition.