COMPUTER SCIENCE AND ENGINEERING
SQL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Select
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Intersection
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Union
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Join
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Detailed explanation-1: -Explanation: The Join operation allows the combining of two relations by merging pairs of tuples, one from each relation, into a single tuple. Hence, option 1 is the correct answer.
Detailed explanation-2: -Explanation: Join finds the common tuple in the relations and combines it.
Detailed explanation-3: -Union (∪) Union operation is done by Union Operator which is represented by “union"(∪). It is the same as the union operator from set theory, i.e., it selects all tuples from both relations but with the exception that for the union of two relations/tables both relations must have the same set of Attributes.
Detailed explanation-4: -Cartesian product operation combines tuples from two relations. It results in all pairs of rows from the two input relations, regardless of whether or not they have the same values on common attributes.