如何将一种关系表现成一种关系

I'm working with a paging system. For some of my co-workers I need to create something of a directory. Each person in the directory has a PAGER_ID and a MESSAGING_ID. The PAGER_ID is unique to a given paging device, while a MESSAGING_ID is unique to a person. A group might work in shifts and pass a single device from shift to shift resulting in several people having an identical PAGER_ID and different MESSAGING_ID. This is fine and by design.I'm working with a paging system. For some of m