求一个start with ... connect by 层次查询的用法，比较完整的实例以及测试数据，谢谢了！

[DiligencyMan]

求一个start with ... connect by 层次查询的用法，比较完整的实例以及测试数据，谢谢了！

[DiligencyMan]

等待之中。

[oraclelogan]

START WITH ... CONNECT BY 层次查询的用法
--建表语句
drop table automobiles
create table automobiles(
       part_id number(5)
         constraint pk_auto_part_id primary key,
       parent_id number(5)
         constraint fk_auto_ppid_ references  automobiles(part_id),
       part_cname varchar2(30) not null,
       part_ename varchar2(30) not null,
       mp_cost number(9,2),
       desribe varchar2(20)     
);
--插入数据
insert into automobiles values( 1,null,'汽车','mobile',84321.99,'Assembly');
insert into automobiles values( 2,1,'车身','bodywork',19892.99,'Manufacture');
insert into automobiles values( 3,1,'发送机','engine',42128,'Purchase');
insert into automobiles values( 4,1,'附件','attached',15212,'Assembly');
insert into automobiles values( 5,2,'保险杠','bumper',4812.95,'Purchase');
insert into automobiles values( 6,2,'底盘','chassis',12795.11,'Manufacture');
insert into automobiles values( 7,2,'行李箱','Boot',812.11,'Manufacture');
insert into automobiles values( 8,6,'车轮','Wheel',2062.2,'Manufacture');
insert into automobiles values( 9,6,'挡泥板','Mudguard',990,'Manufacture');
insert into automobiles values( 10,8,'轮胎','Tyre',300,'Purchase');
insert into automobiles values( 11,3,'发送机盘','Bonnet',3212,'Manufacture');
insert into automobiles values( 12,3,'活塞','Piston',1112.2,'Manufacture');
insert into automobiles values( 13,3,'汽化器','Carburetter',712.29,'Manufacture');
insert into automobiles values( 14,4,'变速器','Gearbox',5712.25,'Manufacture');
insert into automobiles values( 15,4,'仪表板','Dashboard',538.92,'Manufacture');
insert into automobiles values( 16,14,'制动器','Carburetter',712.29,'Manufacture');
insert into automobiles values( 17,14,'变速杆','Gearshift',2001,'Manufacture');
insert into automobiles values( 18,17,'传动轴','Shaft',1101,'Manufacture');
insert into automobiles values( 19,15,'里程表','Milometer',350.28,'Purchase');
/
--分层sql脚本语句练习
select level,part_id,parent_id,part_cname,part_ename,mp_cost,desribe 
from automobiles
start with part_id=1
connect by prior part_id=parent_id 
order by level;
--缩进显示
select level,
	lpad(' ',2*level-1)||part_cname||' '||part_ename as partName
from automobiles
start with part_id=1
connect by prior part_id=parent_id 
order by level;
--使用子查询
select level,
	lpad(' ',2*level-1)||part_cname||' '||part_ename as partName
from automobiles
start with part_id=(
                     select part_id from automobiles where part_cname like '%轴%'
                   )
connect by prior  part_id=parent_id 
order by level;
--自底向上的遍历
select level,
	lpad(' ',2*level-1)||part_cname||' '||part_ename as partName
from automobiles
start with part_id=(
                     select part_id from automobiles where part_cname like '%轴%'
                   )
connect by prior parent_id=part_id
order by level;
--删除指定的节点
select level,
	lpad(' ',2*level-1)||part_cname||' '||part_ename as partName
from automobiles
where part_cname <> '底盘'
start with part_id=1
connect by prior parent_id=part_id
order by level
--删除分支
select level,
	lpad(' ',2*level-1)||part_cname||' '||part_ename as partName
from automobiles
start with part_id=1
connect by prior parent_id=part_id and part_cname <> '底盘'
order by level;

[oraclelogan]

呵呵，以前看书籍的时候做的小例子。不过工作中还没有机会用到start with ....... connect by这个实例呢！

[Andy__Huang]

参考start with ... connect by 用法:
http://blog.csdn.net/hdhai9451/archive/2009/02/12/3880318.aspx

[小墨鱼]

收藏了。。。谢谢！

[白发程序猿]

这种问题楼主应该自己GOOGLE或百度一下就能得到一堆

[DiligencyMan]

[Quote=引用 8 楼 ling242a 的回复:]
这种问题楼主应该自己GOOGLE或百度一下就能得到一堆
[/Quote]

google里面没有测试数据以及完全的sql脚本啊！我是个oracle初学者啊，所以2楼的比较适合我啊，3楼的可以在2楼的基础进一步理解啊！

不好意思！

[DiligencyMan]

[Quote=引用 2 楼 oraclelogan 的回复:]
SQL codeSTART WITH ... CONNECT BY 层次查询的用法
--建表语句
drop table automobiles
create table automobiles(
part_id number(5)
constraint pk_auto_part_id primary key,
parent_id number(5)
constraint fk_auto_ppid_ references automobiles(part_id),
part_cname varchar2(30) not null,
part_ename varchar2(30) not null,
mp_cost number(9,2),
…
[/Quote]

谢谢了！你的例子可以运行成功的。

[DiligencyMan]

[Quote=引用 4 楼 hdhai9451 的回复:]
参考start with ... connect by 用法:
http://blog.csdn.net/hdhai9451/archive/2009/02/12/3880318.aspx
[/Quote]

嗯，不错，对start with...connect by有了更深一层的理解。