Which one of the following method is used to retrieve the number of rows affected by an INSERT, UPDATE, or DELETE query?

A. num_rows()

B. affected_rows()

C. changed_rows()

D. new_rows()

Answer: Option B

Solution(By Examveda Team)

The method num_rows() is only useful for determining the number of rows retrieved by a SELECT query. But to retrieve the number of rows affected by INSERT, UPDATE, or DELETE query, use affected_rows().