SQL SERVER 進行遞迴查詢

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有如下資料表

 

 

假如我們要查詢ID為003的資料的所有子節點我們可以使用CTE 遞迴查詢完成...

 

if OBJECT_ID(‘tb‘,‘N‘) is not null drop table tb;create table tb(id varchar(3) , pid varchar(3) , name varchar(10));insert into tb values(‘001‘ , null , ‘廣東省‘);insert into tb values(‘002‘ , ‘001‘ , ‘廣州市‘); insert into tb values(‘003‘ , ‘001‘ , ‘深圳市‘) ;insert into tb values(‘004‘ , ‘002‘ , ‘天河區‘) ;insert into tb values(‘005‘ , ‘003‘ , ‘羅湖區‘);insert into tb values(‘006‘ , ‘003‘ , ‘福田區‘) ;insert into tb values(‘007‘ , ‘003‘ , ‘寶安區‘) ;insert into tb values(‘008‘ , ‘007‘ , ‘西鄉鎮‘) ;insert into tb values(‘009‘ , ‘007‘ , ‘龍華鎮‘);insert into tb values(‘010‘ , ‘007‘ , ‘松崗鎮‘);select * from tb; with cte as ( select a.id,a.name,a.pid from tb a where id=‘003‘ union all  select k.id,k.name,k.pid  from tb k inner join cte c on c.id = k.pid )select * from cte 

查詢結果如下：
003 深圳市 001
005 羅湖區 003
006 福田區 003
007 寶安區 003
008 西鄉鎮 007
009 龍華鎮 007
010 松崗鎮 007

 

SQL SERVER 進行遞迴查詢