Question

Regarding the interchangeability of subqueries and joins .

a) A join can always be used as an alternative to a subquery, and a subquery can always be used as an alternative to a join.
b) A join can sometimes be used as an alternative to a subquery, and a subquery can sometimes be used as an alternative to a join.
c) A join can always be used as an alternative to a subquery, and a subquery can sometimes be used as an alternative to a join.
d) A join can sometimes be used as an alternative to a subquery, and a subquery can always be used as an alternative to a join.
e) A join can never be used as an alternative to a subquery, and a subquery can never be used as an alternative to a join

Answer 1

A join can sometimes be used as an alternative to a subquery, and a subquery can sometimes be used as an alternative to a join.

Step-by-step explanation:

The correct answer is option b) A join can sometimes be used as an alternative to a subquery, and a subquery can sometimes be used as an alternative to a join.

A join combines rows from two or more tables based on a related column, while a subquery is a query nested within another query. Both joins and subqueries have their advantages and can be used interchangeably in certain situations. For example, a subquery can be used when filtering data based on conditions from another table, while a join can be used when retrieving data from multiple related tables. However, there are cases where one may be more efficient or suitable than the other.