Oracle plsql 打包

--打包
--创建包
--步骤：
--1、声明（创建包头）
--2、创建数据对象（创建包体）

--1、
create or replace package myPack
as
 v_bookCount integer;
 procedure p_back
 (v_stuid borrow.stuid%type,v_bid borrow.bid%type);
 function f_bookCount
 (v_stuid student.stuid%type)
  return integer;
end;

--2、
create or replace package body myPack
as
  procedure p_back
  (v_stuid borrow.stuid%type,v_bid borrow.bid%type)
  as
  begin
   update borrow 
   set b_time=to_date(to_char(sysdate,'yyyy-mm-dd'),'yyyy-mm-dd') 
   where stuid=v_stuid and bid=v_bid;
  end p_back;
  
  function f_bookCount
  (v_stuid student.stuid%type)
  return integer
  as
  begin
   select count(*) into v_bookCount from borrow where
   b_time is null and stuid=v_stuid;
   return v_bookCount;
   exception
    when others then
      return 0;
  end f_bookCount;
end;