User-defined functions that return a table data type can be powerful alternatives to views. These functions are referred to as table-valued functions. A table-valued user-defined function can be used where table or view expressions are allowed in Transact-SQL queries.
1 Go to the iTunes folder that contains the iTunes library files 2  : Windows: Navigate to \Users\ username \Music\iTunes\. 3  Drag the iTunes Library.itl file to your Desktop. 4  In the iTunes folder, open the Previous iTunes Libraries folder. Windows: Navigate to \Users\ username \Music\iTunes\. 2  Drag the iTunes Library.itl file to your Desktop. 3  In the iTunes folder, open the Previous iTunes Libraries folder. 4  Find the file named iTunes Library YYYY-MM-DD where YYYY-MM-DD is the date you updated iTunes (Year-Month-Day).
To copy your iTunes library with an external hard drive, simply locate your iTunes folder as demonstrated as above. Then copy and paste it onto your hard drive. From here you will need to copy and paste the library on the hard drive in the relevant iTunes folder on your Windows or Mac computer.opying your iTunes library over a network. To copy your iTunes library, drag and drop this folder from one PC to the other. If you have connected the two computers by Wi-Fi and have a large music collection, expect a long wait.