Answer
See the explanation
Work Step by Step
The "where" clause in a JOIN operation may not be necessary when dealing with certain types of queries because the JOIN operation itself inherently combines every tuple from one relation with every tuple from the other. This cross-product behavior eliminates the need for a specific "where" clause to define the condition for joining, as the JOIN operation naturally considers all possible combinations.
However, it's important to note that such an approach could result in a large Cartesian product, potentially leading to inefficiencies in terms of computational resources and performance.
