Schema for Examples
•
•Purchase:
–Each tuple is 40 bytes long,  100 tuples per page, 1000 pages (i.e., 100,000 tuples, 4MB for the entire relation).
•Person:
–Each tuple is 50 bytes long,  80 tuples per page, 500 pages (i.e, 40,000 tuples, 2MB for the entire relation).
Purchase (buyer:string, seller: string, product: integer),
Person (name:string, city:string, phone: integer)