🗊Презентация Acknowledgement: These questions are from Standford Open Course Introduction to Databases

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Acknowledgement: These questions are from Standford Open Course Introduction to Databases, слайд №1Acknowledgement: These questions are from Standford Open Course Introduction to Databases, слайд №2Acknowledgement: These questions are from Standford Open Course Introduction to Databases, слайд №3Acknowledgement: These questions are from Standford Open Course Introduction to Databases, слайд №4Acknowledgement: These questions are from Standford Open Course Introduction to Databases, слайд №5Acknowledgement: These questions are from Standford Open Course Introduction to Databases, слайд №6
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Слайд 1


Tutorial 4 RA Exercises
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Tutorial 4 RA Exercises

Слайд 2


Compute the union of R and S. Which of the following tuples DOES NOT appear in the result?
Описание слайда:
Compute the union of R and S. Which of the following tuples DOES NOT appear in the result?

Слайд 3


Acknowledgement: These questions are from Standford Open Course Introduction to Databases, слайд №3
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Слайд 4


Acknowledgement: These questions are from Standford Open Course Introduction to Databases, слайд №4
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Слайд 5


Acknowledgement: These questions are from Standford Open Course Introduction to Databases, слайд №5
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Слайд 6


Consider a relation R(A) with r tuples, all unique within R, and a relation S(A) with s tuples, all unique within S. Let t represent the number of tuples in R minus S. Which of the following triples of values (r,s,t) is possible? (10,5,2) (5,3,1) (5,0,3) (5,3,4
Описание слайда:
Consider a relation R(A) with r tuples, all unique within R, and a relation S(A) with s tuples, all unique within S. Let t represent the number of tuples in R minus S. Which of the following triples of values (r,s,t) is possible? (10,5,2) (5,3,1) (5,0,3) (5,3,4

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