Question
a.
{< c > | Э s (< c, a, s, y, b, r, t >ε section
∧s = “Fall” ∧ y = “2009”
∨Эu (< c, a, s, y, b, r, t >ε section
∧s = “Spring” ∧ y = “2010”
b.
{< n, c > | Э i, a (< i, c, a, s, y > ε teaches
∧ Э d, s (< i, n, d, s > ε instructor ∧ d = “Physics”))}
c.
{< n > | Э i, d, s (< i, n, d, s > ε instructor ∧ s > 80000)}
d.
{< i, n, d, s > | < i, n, d, s > ε instructor ∧ s > 80000}
Posted under DBMS
∧ Э d, s (< i, n, d, s > ε instructor ∧ d = “Physics”))}
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Q. Find the names of all instructors in the Physics department together with the course id of all courses they teach:
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