mysql创建函数的问题

Question

满足输入两个整数参数后，返回两个参数（含）之间的5的倍数的个数

Answer 1

delimiter $$
create  function test(a int,b int)
returns int
NO SQL 
begin
    declare i,c int;
    set c=0;
    set i = a;
    while i<=b do
        if i%5=0 then set c=c+1;
        end if;
        set i=i+1;
    end while;
    return c;
end
$$
delimiter ;

select test(5,25);