Tuple Relational Calculus query is expressed as ______.
2020
Tuple Relational Calculus query is expressed as ______.
- A.
{ T | p(T) }
- B.
{ P() | T }
- C.
{ p(T) | T }
- D.
{ T | P() | T }
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Correct answer: A
In Tuple Relational Calculus (TRC), a query is expressed as { T | p(T) }. Here, T represents the tuple variable and p(T) is a formula (predicate) that describes the condition the tuple must satisfy. It non-procedurally describes "what" data is needed. The correct option is A.