The question asks for the number of tuples resulting from a natural join (⋈) between two relations R1 and R2. A natural join combines tuples from two relations based on matching values in their common attributes. In this case, the common attributes are Q and R.To find the result of R1 ⋈ R2, we identify tuples in R1 and R2 that have the same values for both Q and R. For every match found, a new tuple is formed by concatenating the attributes from both original tuples, excluding the duplicated common attributes.The number of tuples in the natural join is the sum of the products of the counts of matching (Q, R) pairs in each relation.
Consider Relations R1 and R2 as given below - R1 (P, Q, R) P Q R p q r k i j m q r d e f R2 (Q, R, S) Q R S q r n i c o q r a q r b e f g The number of tuples in output of R1 ⋈ R2 will be - - Question not attempted
Asked in Programmer Exam 2024 · Topic: Basics of Computers and Information Technology (Database Management Systems (DBMS) Basics: Concepts, Types of Databases)
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