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11. Let R1 and R2 be the relations on {1,2,3,4} given by R1 = {(1,1), (1,2), (3,4), (4,2)} R2 = {(1,1), (2,1), (3,1), (4,4), (2,2)}
11. Let R1 and R2 be the relations on {1,2,3,4} given by R1 = {(1,1), (1,2), (3,4), (4,2)} R2 = {(1,1), (2,1), (3,1), (4,4), (2,2)}
List the elements of R1 R2 and R2 R1
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Informix Database Administrators Survival Guide
Authors: Joe Lumbley
1st Edition
0131243144, 978-0131243149
