Study the database table named weather given below, where record$\_$number is the primary key:

Refer to the code below:

$rf $=10$;

$query $=$ "UPDATE weather SET rainfall $=?$ WHERE record$\_$number $=4"$;

$statement $=$ $db$->$prepare$($$query$)$;

$statement $->$bindValue$(1,$ $rf$)$;

$rowCount $=$ $statement$->$execute$()$;

$statement$->$closeCursor$()$;

Assume that a PDO object named $db is correctly connected to the relevant database.

Which of the following options is correct about the code given below?