extracting info from 2 different tables

Hi,

I'm creating a database for a charity and I have 2 tables - 1 for private donors (private donor codes are DI0001, DI0002, DI0003 etc) and 1 for company donors (company donor codes are DC0001, DC0002, DC0003 etc).

If I have a table for "new donations" one of the fields should donor - in which case how do I oull put the unique donor codes from the 2 tables?When the user gets to this bt where they are required to input the donor code, the options should be ALL donor codes beginning with DI and DC, but since they arein 2 seperate tables, how do I do this?

Thank you!