Filestreams are a great way to store files in SQL Server. SQL Server makes this super easy by managing the storage of the physical files on the file system somewhere. But what if you want to get access to these files or if you just want to know where they’re stored. SQL Server provides a function called PathName that you can call to get this path. You call this function like you would call an extension method in .Net. In the example below, we’ll assume that the column InvoiceFile is a Filestream datatype.
SELECT TOP 1
InvoiceFile.PathName() AS DirectoryOfFile