Rel algebra set theory girija

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Information about Rel algebra set theory girija

Published on March 10, 2014

Author: nbgirija



set theory, relational algebra, union, intersection, difference, sql, database

Relational Algebra Operations Set theory Unary relational operation Binary relational operation

Symbolic Notation use symbolic notation to represent the operators. UNION -> ∪ (cup) SELECT ->σ (sigma) INTERSECTION -> ∩(cap) PROJECT -> π(pi) DIFFERENCE -> - (minus) PRODUCT -> ×(times) RENAME ->ρ (rho) JOIN -> |×| (bow-tie) (AND) -> ^ Not -> (OR) -> v







Exercise 2 R∪S

Exercise 2 - PRODUCT

Exercise 3

Exercise 3 - SOLUTION

Exercise 4 Graduates U managers Graduates – managers Managers - graduates Graduates ∩ managers

Exercise 4 - Solution

Exercise 4 - Solution

Exercise 4 - Solution

Exercise 5

Exercise 5 solution

Exercise 6

Exercise 7

Exercise 7 - solution

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