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Find the intersection of FA2 and FA3. Generate the RE.   Why the table is wrong I tried to do the according to the given example. What did I do wrong?

Find the intersection of FA2 and FA3. Generate the RE.   Why the table is wrong I tried to do the according to the given example. What did I do wrong?

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Ex: Find the intersection of FA2 and FA3. Generate the RE.  

Why the table is wrong I tried to do the according to the given example. What did I do wrong?

FA2 FA3 a a r,+ 90-+ 91 b a b a r2+ 92 bo
Transcribed Image Text:FA2 FA3 a a r,+ 90-+ 91 b a b a r2+ 92 bo
Intersection a b FA2 FA2' FA3 FA3' (FA2'+FA3')' FA2 FA3 FA2+FA3 r1 q1 r1 q1 r1 q1 ro q1 ro q1 ro q1 r1 q1 r1 q1 r1 q1 FA2'+FA3' FA2 FA3 FA2+FA3 r2 q0 r2 q2 z1 roqo z2 roq1 23 roq2 24 r1q0 25 r1q1 z6 r1q2 z7 r2q0 28 r2q1 29 r2q2 5 7 5 r2 q0 7 r2 q0 7 + q2 r2 q0 + + r2 9. + 2 7 5 q0 ro q2 q0 + + r0 1 + + 5 3 + + ro 1 + + 十 + +
Transcribed Image Text:Intersection a b FA2 FA2' FA3 FA3' (FA2'+FA3')' FA2 FA3 FA2+FA3 r1 q1 r1 q1 r1 q1 ro q1 ro q1 ro q1 r1 q1 r1 q1 r1 q1 FA2'+FA3' FA2 FA3 FA2+FA3 r2 q0 r2 q2 z1 roqo z2 roq1 23 roq2 24 r1q0 25 r1q1 z6 r1q2 z7 r2q0 28 r2q1 29 r2q2 5 7 5 r2 q0 7 r2 q0 7 + q2 r2 q0 + + r2 9. + 2 7 5 q0 ro q2 q0 + + r0 1 + + 5 3 + + ro 1 + + 十 + +
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