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Relational Calculus
GATE CSE & IT · Database Management Systems - Relational Calculus · 2001-2025
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All concepts →2025 Q39
Consider two relations describing teams and players in a sports league: * teams (tid, tname): tid, tname are team-id and team-name, respectively * players(pid, pname, tid): pid, pn...
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2009 PYQ
Let R and S be relational schemes such that R = { a, b, c } and S = { c }. Now consider the following queries on the database: I. $$\pi_{R-S}(r) - \pi_{R-S} \left (\pi_{R-S} (r) \t...
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2002 PYQ
With regard to the expressive power of the formal relational query languages, which of the following statements is true?
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2001 PYQ
Which of the following relational calculus expressions is not safe?
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