Question

oracle 在自定义函数怎么声明变量

作业要求是用自定义函数实现1到20时的累乘,用while循环做,但至少要涉及到两个变量,该怎么声明

Answer 1

呃，一个输入变量，一个输出变量不就结了
create or replace function Fun_Multiplicative(v_input in number) return number is
v_result number(8);
v_total number(8) :=1;
v_count number(5) :=1;
begin
while v_count <= v_input loop
v_total := v_total * v_count;
v_count := v_count + 1;
end loop;
v_result := v_total;
return(v_result);
end Fun_Multiplicative;

Answer 2

create or replace function my_fun return number is
i number := 1;
total number := 1;
begin
while i<=20 loop
total := total*i;
i := i+1;
end loop;
return total;
end my_fun;