Oracle PL/SQL程序包练习

1.在一个包中定义两个重载的方法，两个方法作用都是求一个数到另一个数的和并将和返回，方法申明如下： function getSum(endNumber int) return int; 没有指定开始值，直接求1到endNumber的和并返回 function getSum(endNumber int，beginNumber int) return int; 求beginNumber到endNumber的和并返回

1.创建包头

create package pack_sum
as
function getSum(endNumber int) return int;
function getSum1(endNumber int, beginNumber int) return int;
end pack_sum;

2.创建包的主体

create or replace package body pack_sum
as
       function getSum(endNumber int) return int
       as
                sum_count int:=0;
       begin
                for var in 1..endNumber loop
                    sum_count:=sum_count+var;        
                end loop;
       return sum_count;
       end getSum;
       function getSum1(endNumber int, beginNumber int) return int
       as
                sum_count int:=0;
       begin
                if endNumber>beginNumber then
                   raise_application_error(-20202,'endNumber不得大于beginNumber！');
                else
                   for var in endNumber..beginNumber loop
                       sum_count:=sum_count+var;      
                   end loop;
                end if;
        return sum_count;
        end getSum1;
end pack_sum;

3.调用函数

declare
c int;
sum_count number:=&sum_count;
begin
  c:=pack_sum.getSum(sum_count);
  dbms_output.put_line('结果'||c);
end;

declare
c int;
sum_count number:=&sum_count;
sum_count1 number:=&sum_count1;
begin
  c:=pack_sum.getSum1(sum_count,sum_count1);
  dbms_output.put_line('结果'||c);
end;

来源：CSDN

作者：chaimhao

链接：https://blog.csdn.net/weixin_43330884/article/details/103879981