Which of the following represents a query in the tuple relational calculus?
A. { }{P(t) | t }
B. {t | P(t)}
C. t | P() | t
D. All of the mentioned
Answer:B
Which of the following represents a query in the tuple relational calculus?
A. { }{P(t) | t } B. {t | P(t)} C. t | P() | t D. All of the mentioned