Posted on 2008-04-21 16:12
semovy 阅读(519)
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Oracle数据库方面
/*drop table categories;
create table categories
(
id int primary key ,
pid int ,
name varchar(64),
constraint cc_fk foreign key(pid) references categories(id) on delete cascade
);
create or replace procedure ins_cat(v_id int,v_pid int,v_name varchar2) as
begin
insert into categories values(v_id,v_pid,v_name);
end ins_cat;
*/
--delete from categories;
/*
begin
ins_cat(1,null,'category1');
ins_cat(2,null,'category2');
ins_cat(3,1,'category3');
ins_cat(4,1,'category4');
ins_cat(5,2,'category5');
ins_cat(6,2,'category6');
ins_cat(7,4,'category7');
ins_cat(8,4,'category8');
ins_cat(9,5,'category9');
end;
*/
select * from categories;
--start with .. connect by 递归遍历无限级类别
select * from categories start with id=2
connect by prior id=pid;