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The result of the UNION operation between R1 and R2 is a relation that includes 

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in Database Management System by (30.5k points)

The result of the UNION operation between R1 and R2 is a relation that includes 

(a) all the tuples of R1 

(b) all the tuples of R2’ 

(c) all the tuples of R1 and R2 

(d) all the tuples of R1 and R2 which have common columns

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1 Answer

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by (30.4k points)

(c) All the tuples of R1 and R2 (eliminating the duplication)

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