We do a full backup of our SQL Server 2012 database every night.
A new developer needs an incremental (or differential) backup of a backup we took one week ago. The reason is that for them, importing the data takes several days, as their destination is not SQL server and has to go through several transformations.
There have been 7 full backups since the last backup they imported.
How do I get them the incremental backup that they need? Do I use differential or log shipping and how do I account for that fact that the data they have is one week old with several full backups in between?