create table fact5555(num number(8),result number(8));
insert into fact5555(num) values(5);
insert into fact5555(num) values(6);
insert into fact5555(num) values(7);

//creation of function for finfding the factorial of a number:
Create Function fact55(e number) return number is
z number:=1;
i number:=e;
begin
while(i>0) loop
z:=z*i;
i:=i-1;
end loop;
return z;
end fact55;