The 4tuples in a 4ary relation represent these attributes of

The 4-tuples in a 4-ary relation represent these attributes of published books: title, ISBN, publication date, number of pages.

a) What is a likely primary key for this relation?

b) Under what conditions would (title, publication date) be a composite key?

c) Under what conditions would (title, number of pages) be a composite key?

Solution

a) ISBN