"Sliding Window" is just a term for a technique. It is not an actual command. Here is an article on Microsoft Technet that explains how to use the technique. You can use it to do a 7 day range. It will
In this article we will get to know that how can we recover deleted data if it happens accidently. We really can recover deleted rows if we know the time when data is deleted by using the transaction log.
Using examples as well as descriptions, and references to Books Online, show the different Recovery Models available in SQL Server and explain, as well as show how full, differential and transaction log backups are performed