List all copies of the book title “Lord of the Rings” that are available for borrowing.
What will be an ideal response?
RA: ? copyNo (? title=‘Lord of the Rings’ (Book) ISBN (? available=‘Y’ (BookCopy)))
TRC: {BC.copyNo | BookCopy(BC) ? (?B) (Book(B) ? (B.ISBN = BC.ISBN) ?
(BC.available=‘Y’) ? (B.title= ‘Lord of the Rings’))}
DRC: {copyNo | (?ISBN, edn, yr, ISBN, avail) (Book(ISBN, title, edn, yr) ?
BookCopy(copyNo, ISBN, avail) ? avail=’Y’ ? title= ‘Lord of the
Rings’)}
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