Stretch Database
Data can be split between on-premises and cloud storage.
With Stretch Database, cold/audit data is kept in the cloud and data remains available for users to
query, might be a small amount of additional latency associated with queries. Data in the cloud is backed up automatically.
With Stretch Database, active data is kept on-premises for maximum performance and reduce storage requirements both for data and backups (it run quicker than standard backups).
It requires no changes to new or existing TSQL queries.