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========== Java ===================
class Parent {
  private int objId,
  private String name;
  private List chidren;
}
class Child {
  private int objId;
  private String name;
  private Parent parent;
}

============== oracle ==============
oracleµÄobject£¬child±»Ç¶Ì×µ½parentÀïÃæ£¬java ´úÂëÖУ¬ÓÐÒ»¸ö Parent object, parent ÖÐÓÐChild µÄ list¡£´æ´¢¹ý³ÌÊÇinsert parentÒÔ¼°ÏàÓ¦µÄһϵÁÐchild¡£Ó¦¸ÃÈçºÎ´«parent ¸ú childµ½oracle´æ´¢¹ý³ÌÄØ£¿

create  type t_child as object (
    child_name varchar2(100),
);


create  type t_child_lst as table of t_child;

create type t_parent as object (
    name varchar2(100),
    title varchar2(10),
    children t_child_lst
);
Äãÿ´Î¶¼Òª²åÈëºÜ¶àparentÂð
Èç¹ûÕâÑù½¨ÒéÂ¥Ö÷½¨Á¢ÁÙʱ±í°É

Èç¹ûÒ»´Î¾ÍÒ»¸öparent£¬½¨Òé´æ´¢¹ý³Ì²ÎÊýΪparentid,chidrenids

create or replace type  chidrenids  is  table  of  number;

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Èç¹û Parent, Ch


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SQL> select name from v$database;
NAME
---------
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