--定义包头

create or replace package 包名
as
  变量、常量声明;
  函数声明;
  过程声明;
end;

--定义包体

create or replace package body 包名
as
  函数实际代码;
  过程实际代码;
end;

create or replace package pkg_school
as 
  stucount int;
  procedure prc_getstucount;
end;

create or replace package body pkg_school
as
  procedure prc_getstucount
  as
  begin
    select count(*)
    into stucount
    from t_student;
    dbms_output.put_line(‘人数为：‘||stucount);
  end;
end;

PL/SQL 09 包 package