Scenario: SALESDB must be restorable to any given minute within the past three weeks.
The Azure SQL Database service protects all databases with an automated backup system. These backups are retained for 7 days for Basic, 35 days for Standard and 35 days for Premium. Point-in-time restore is a self-service capability, allowing customers to restore a Basic, Standard or Premium database from these backups to any point within the retention period.
References:
https://azure.microsoft.com/en-us/blog/azure-sql-database-point-in-time-restore/