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If I had known you were coming, I ... a cake.:
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Consider the relational database schema BOOK_COPY(Book_id, Branch_id, Title, Publisher, primary key(Book_id, Branch_id)), BOOK_LOAN(Book_id, Branch_id, Card_no, Issue_date, Return_date, primary key(Book_id, Branch_id, Card_no)), LIBRARY_BRANCH(Branch_id primary key, Name, Address). One of the foreign keys in the schema is
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He would have gone to work if he ... sick.:
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Let R(A, B, C, D, E, F) be a relation schema with functional dependencies: A determines B, A determines C, CD determines E, CD determines F, B determines E. Which of the following functional dependencies does not hold on R?
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If the road hadn't been icy, we ... an accident. :
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If only we ... the directions!:
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A computer has to send a packet to a destination host in the same LAN. How will the packet be sent?
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Acuerdo entre empleador y empleado en el que tiempo, talento y energía se intercambian por sueldos, horarios y condiciones de trabajo razonables:
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Consider the set of functional dependencies F = {A determines BC, CD determines E, B determines D, E determines A} defined on a relation schema R(A, B, C, D, E). The closure of CD is
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If XY determines Z and Z determines UV then
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