The goal of the high availability architecture in Azure SQL Database is to minimize impact on customer workloads from service maintenance operations and outages. For information regarding specific ...

The default availability solution is designed to ensure that committed data is never lost due to failures, that maintenance operations don't affect your workload, and that the database isn't a single ...

If organizations use zone-redundant databases with the Azure SQL Database service under the Business Critical tier (also known as "Premium"), then they can now be eligible for a 99.995 percent SLA.