hibernate一对多(双向)有数据库说明

create table country( id int primary key, name varchar(23), area varchar(23), ADDRESS VARCHAR2(23)); create sequence coutry_s; create or replace trigger county_T before insert on country for each row begin select county_s.nextval into new.id from dual; end; / create table city( id int primary key, countryid int, NAME varchar(23), AGE int); alter add constraint fk11 foreign key (countryid) references country (id); //增加外键,使两表建立关系 create sequence city_s; create or replace trigger city_t before insert on city for each row begin select city_s.nextval into :new.id from dual; end; / 数据库ORACLE自动增长列，哈哈,有机会一齐玩,你说去哪呢,听你的