rel algebra set theory girija
Post on 14-Jun-2015
143 Views
Preview:
DESCRIPTION
TRANSCRIPT
Relational Algebra Operations
Set theory Unary relational operation
Binary relational operation
Symbolic Notation use symbolic notation to represent the operators.
SELECT ->σ (sigma)
PROJECT -> π(pi)
PRODUCT -> ×(times)
JOIN -> |×| (bow-tie)
UNION -> ∪ (cup)
INTERSECTION -> ∩(cap)
DIFFERENCE -> - (minus)
RENAME ->ρ (rho)
(AND) -> ^
(OR) -> v
Not ->
S2-S1
R ∪ S R ∩ S R – S S - R
EXERCISE 1
EXERCISE 1 -RESULT
EXERCISE 1 -RESULT
EXERCISE 1 -RESULT
EXERCISE 1 -RESULT
Exercise 2
R ∪ S
Exercise 2 - PRODUCT
Exercise 3
Exercise 3 - SOLUTION
Exercise 4
Graduates – managers
Managers - graduates
Graduates U managers
Graduates ∩ managers
Exercise 4 - Solution
Exercise 4 - Solution
Exercise 4 - Solution
Exercise 5
Exercise 5 solution
Exercise 6
Exercise 7
Exercise 7 - solution
top related