Which statement about nested queries in SQL is FALSE?
A) In small databases, there is not a significant time difference between nested subqueries and table joins.
B) Typically, nested subqueries perform faster than queries that join tables.
C) A nested query is a subquery within a subquery.
D) Executing each subquery in a nested query produces a temporary table.

Question

Quizplus · Accepted Answer

Nested subqueries often perform slower than queries that join tables because the database engine may need to execute the inner query multiple times for each row processed by the outer query, leading to potentially less efficient execution plans compared to joins.

Which Statement About Nested Queries in SQL Is FALSE