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The SQL VDB Engine, which consists of the Filter Driver and Filter Service, manages the virtual database and services the SQL Server I/O requests to the virtual data files. As the SQL VDB Engine attaches your selected backup files and creates the virtual database, it consolidates all the transactions and presents them to SQL Server for recovery. During this process, SQL Virtual Database "maps" the data from the backup files. If the data is already "mapped,", such  such as through SQL Safe or the Map Generation CLI action, then SQL Virtual Database proceeds to the virtual database creation.You can create a virtual database by attaching specific data sets from multiple full, differential, and transaction log backups.

You can then use the SQL VDB Console, or any other third-party tool, to perform queries against specific virtual databases or simply check the status of your virtual databases. For more information, see our instructions on how to use your virtual database, as  as well as tips and tricks.

The product features, such as the virtual database creation, are also available through the SQL VDB CLI. For more information, see the product component descriptions.

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