Question

What are r1 and r2 in Algebra.

Answer 1

Answer:

Step-by-step explanation:

For the set operations on relations, both operands must have the same scheme, and the result has that same scheme. R1 U R2 (union) is the relation containing all tuples that appear in R1, R2, or both. ... R1 - R2 (set difference) is the relation containing all tuples of R1 that do not appear in R2.

Answer 2

R1 U R2 (union) are the relation containing all tuples that appearing in both R1 and R2

Step-by-step explanation:

R1 U R2 (union) are the relation containing all tuples that appearing in both R1 and R2