Using cursor write a pl/sql code that if Coloumn Name(Sr.NO) is present into table Class A then insert those value into Table Class B - DBMS (Cursor)

declare

cursor abc(a number) is select * from classA;

rec abc%rowtype;

n number(5);

begin

n:=&n;

open abc(n);

loop

fetch abc into rec;

if n=rec.no

then

insert into classB values(n,rec.name);

end if;

exit when abc%notfound;

end loop;

end;