Using SQL Language 2 a) The relation algebra operation that retrieves tuples that are shared in two relations, is a(n) _

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Using SQL Language
2
a)
The relation algebra operation that retrieves tuples that are
shared in two relations, is a(n) _______.
Union
Cartesian products
Difference
Intersection
b)
Relational Algebra is a language based on operators and
relations, is also known as __________ query language
Relational
Procedural
Structural
Fundamental
c)
Which of the following is known as a unary relational algebra
operation:
Selection
Projection
Fundamental
public selection
d)
Which of the following join operators naturally contains an
equality operator in the condition:
Cartesian
Natural
Left
Equijoin