What operation(s), if used, make the JOIN operation redundant in relational algebra?

Correct option is A

In relational algebra, a JOIN operation can be simulated using a Cartesian Product followed by a Selection operation.
· The Cartesian Product generates all possible combinations of tuples from two relations.
· The Selection operation filters tuples based on the given condition, effectively replicating the JOIN functionality.
Important Key Points:
1. Cartesian Product creates a superset of tuples, which is refined using the Selection operation.
2. The JOIN operation is essentially a shortcut for these two combined steps.
3. Projection can be used along with JOIN or Cartesian Product to select specific attributes.
Knowledge Booster:
· Union: Combines tuples from two relations but does not handle conditions or relationships between them.
· Intersection: Retrieves common tuples from two relations.
· Selection: Filters tuples based on specific criteria but does not combine two relations.