You need to design a highly available Azure SQL database with zero data loss during failover. Which deployment option should you select?

To achieve a highly available Azure SQL database solution with zero data loss during failover, selecting Azure SQL Database Premium is the most suitable option. The Premium tier offers high performance and low latency, and it is specifically designed for mission-critical workloads. One of its key features is the ability to use Active Geo-Replication, which allows you to have up to four secondary databases in different regions, providing both high availability and disaster recovery. In the event of a primary region failure, you can failover to a secondary region with minimal downtime and no data loss.

In contrast, the other deployment options do not provide the same level of availability and data loss prevention. For instance, Azure SQL Database Hyperscale is designed for workloads that require rapid scaling and large databases, but it does not inherently guarantee zero data loss during failover unless combined with specific configurations. The Basic tier lacks the performance and features required for high availability and cannot support critical features like geo-replication. Azure SQL Managed Instance General Purpose, while offering a good level of performance and availability, may not meet the same high standards for zero data loss during failover as the Premium service does, especially in a tightly controlled, performance-sensitive environment.

Thus, Azure SQL Database Premium is the optimal choice