Question

我有一个房子对象，里面有房子信息。我正在创建另一个对象 - 村庄 - 每个可以包括2到50个房子。我正在努力创建村庄对象，更具体地说是在循环功能中 - 我希望村庄变形包括一系列房屋和成员函数返回一个村庄的人口。

众议院对象

CREATE or REPLACE type house as object (
  house_no number,
  road_name varchar2(20),
  postcode varchar2(10),
  no_of_residents number,
  member function pass(h house) return number
);
/

乡村对象

CREATE or REPLACE type village_array is varray(50) of house (
  village_id number,
  village_name varchar2(25),
  population number,
  member function village_population(p v_population) return number  
);
/

村庄对象团体

CREATE or REPLACE type body village_array as
 member function village_population(p v_population) return number is

 begin

    /*
    This is where I am clearly struggling to sum all of the house residents
    and returning the population of a village. I have a feeling it is some
    kind of for loop in here somewhere
    */

    then 
        return ;
    else 
        return ;
 end;

end;
/

我的村庄表

CREATE Table Village (
  village_id number,
  village village_array
)

返回编号的对象集合

0 个答案: