... is obviously not appropriate. This is acommon problem with composite keys, which are often not thought out properly. In this case, youmight choose ISBN_Number as the PK and (Publisher_Name,Book_Name) ... Publisher_City, ISBN_Numberindex in your SQL Server database. However, this would notbe identified as a key of a table. In Chapter 6, we’ll discuss implementing keys, and in Chapter 8, we’ll coverimplementing ... invoices, bills, and computer-generated notices): These usu-ally have some sort of number assigned when they are printed.•For products for sale: These could be product numbers (product names...