View Single Post
  #94  
Old January 27th, 2008, 08:36 PM posted to comp.databases.ms-access, comp.databases.theory,microsoft.public.access, microsoft.public.access.tablesdbdesign,microsoft.public.sqlserver
-CELKO-
external usenet poster
 
Posts: 26
Default Separate PK in Jxn Tbl?

If I were a library lending 2 undiffentiatable copies of 1 book to the same person, I suppose I would need an Autonumber PK plus A BookID and BorrowerID.

No, you would fire your librarian for failure to keep an accession
number or copy number as part of the book's identifier. And the book
should be identified by an ISBN.