SQL 递归查询示例： create table #EnterPrise( Department nvarchar(50),--部门名称 ParentDept nvarchar(50),--上级部门 DepartManage nvarchar(30)--部门经理)insert into #EnterPrise select '技术部','总经办','Tom'insert into #EnterPrise select '商务部','总经办','Jeffry'insert into #EnterPrise select '商务一部','商务部','ViVi'insert into #EnterPrise select '商务二部','商务部','Peter'insert into #EnterPrise select '程序组','技术部','GiGi'insert into #EnterPrise select '设计组','技术部','yoyo'insert into #EnterPrise select '专项组','程序组','Yue'insert into #EnterPrise select '总经办','','Boss'--查询部门经理是Tom的下面的部门名称;with hgo as( select *,0 as rank from #EnterPrise where DepartManage='Tom' union all select h.*,h1.rank+1 from #EnterPrise h join hgo h1 on h.ParentDept=h1.Department)select * from hgo/*Department ParentDept DepartManage rank--------------- -------------------- ----------------------- -----------技术部 总经办 Tom 0程序组 技术部 GiGi 1设计组 技术部 yoyo 1专项组 程序组 Yue 2*/--查询部门经理是GiGi的上级部门名称;with hgo as( select *,0 as rank from #EnterPrise where DepartManage='GiGi' union all select h.*,h1.rank+1 from #EnterPrise h join hgo h1 on h.Department=h1.ParentDept)select * from hgo/*Department ParentDept DepartManage rank-------------------- ---------------------- ----------- -----------程序组 技术部 GiGi 0技术部 总经办 Tom 1总经办 Boss 2*/--===========================================================================================================create table #tt(id int,parentid int,name varchar(20))insert #ttselect 1,0,'上海市'union allselect 2,1,'虹口区'union allselect 3,1,'徐汇区'union allselect 4,1,'浦东新区'union allselect 5,2,'江湾镇'union allselect 6,2,'虹口足球场'union allselect 7,5,'吉买盛'union allselect 8,5,'易卜莲花'union allselect 9,5,'农工商'union allselect 10,6,'吉买盛'with cte as(select *,0 as levl from #tt where id=2union allselect a.*,b.levl+1 from #tt a,cte b where a.parentid=b.id)select * from cte where levl>0 -- id parentid name levl----------- ----------- -------------------- ----------- 5 2 江湾镇 1 6 2 虹口足球场 1 10 6 吉买盛 2 7 5 吉买盛 2 8 5 易卜莲花 2 9 5 农工商 2==============================================================================================if not object_id('Tab') is null drop table TabGoCreate table Tab([Id] int,[ParentId] int,[Name] nvarchar(50))Insert Tabselect 1,0,N'上海市' union allselect 2,1,N'虹口区' union allselect 3,1,N'徐汇区' union allselect 4,1,N'浦东新区' union allselect 5,2,N'江湾镇' union allselect 6,2,N'虹口足球场' union allselect 7,5,N'吉买盛' union allselect 8,5,N'易卜莲花' union allselect 9,5,N'农工商' union allselect 10,6,N'吉买盛'GoIF OBJECT_ID('P_GetParentId') is not null drop proc P_GetParentIdgo Create proc P_GetParentId( @ParentId int)asbegindeclare @Del table(ID int,[ParentId] int)insert @Del select ID,[ParentId] from Tab a where exists(select 1 from Tab where a.Id = 2)while @@rowcount>0 begin insert @Del select a.ID,a.[ParentId] from Tab a inner join @Del b on b.ID=a.[ParentId] where not exists(select 1 from @Del where ID=a.ID) end select * from @DelendgO--TESTEXEC P_GetParentId 2--结果--/*ID ParentId----------- -----------2 15 26 27 58 59 510 6*/--============================================================================================ --SQL code/*标题：SQL SERVER 2000中查询指定节点及其所有子节点的函数(表格形式显示)作者：爱新觉罗·毓华(十八年风雨,守得冰山雪莲花开)时间：2008-05-12地点：广东深圳*/create table tb(id varchar(3) , pid varchar(3) , name varchar(10))insert into tb values('001' , null , '广东省')insert into tb values('002' , '001' , '广州市')insert into tb values('003' , '001' , '深圳市')insert into tb values('004' , '002' , '天河区')insert into tb values('005' , '003' , '罗湖区')insert into tb values('006' , '003' , '福田区')insert into tb values('007' , '003' , '宝安区')insert into tb values('008' , '007' , '西乡镇')insert into tb values('009' , '007' , '龙华镇')insert into tb values('010' , '007' , '松岗镇')go--查询指定节点及其所有子节点的函数create function f_cid(@ID varchar(3)) returns @t_level table(id varchar(3) , level int)asbegin declare @level int set @level = 1 insert into @t_level select @id , @level while @@ROWCOUNT > 0 begin set @level = @level + 1 insert into @t_level select a.id , @level from tb a , @t_Level b where a.pid = b.id and b.level = @level - 1 end returnendgo--调用函数查询001(广东省)及其所有子节点select a.* from tb a , f_cid('001') b where a.id = b.id order by a.id/*id pid name ---- ---- ----------001 NULL 广东省002 001 广州市003 001 深圳市004 002 天河区005 003 罗湖区006 003 福田区007 003 宝安区008 007 西乡镇009 007 龙华镇010 007 松岗镇（所影响的行数为 10 行）*/--调用函数查询002(广州市)及其所有子节点select a.* from tb a , f_cid('002') b where a.id = b.id order by a.id/*id pid name ---- ---- ----------002 001 广州市004 002 天河区（所影响的行数为 2 行）*/--调用函数查询003(深圳市)及其所有子节点select a.* from tb a , f_cid('003') b where a.id = b.id order by a.id/*id pid name ---- ---- ----------003 001 深圳市005 003 罗湖区006 003 福田区007 003 宝安区008 007 西乡镇009 007 龙华镇010 007 松岗镇（所影响的行数为 7 行）*/drop table tbdrop function f_cid/*SQL code@@ROWCOUNT：返回受上一语句影响的行数。返回类型：integer。注释：任何不返回行的语句将这一变量设置为 0 ，如 IF 语句。示例：下面的示例执行 UPDATE 语句并用 @@ROWCOUNT 来检测是否有发生更改的行。*/UPDATE authors SET au_lname = 'Jones' WHERE au_id = '999-888-7777'IF @@ROWCOUNT = 0 print 'Warning: No rows were updated'/*结果：(所影响的行数为 0 行)Warning: No rows were updatedSQL code*//*标题：SQL SERVER 2005中查询指定节点及其所有子节点的函数(表格形式显示)作者：爱新觉罗·毓华(十八年风雨,守得冰山雪莲花开)时间：2010-02-02地点：新疆乌鲁木齐*/create table tb(id varchar(3) , pid varchar(3) , name nvarchar(10))insert into tb values('001' , null , N'广东省')insert into tb values('002' , '001' , N'广州市')insert into tb values('003' , '001' , N'深圳市')insert into tb values('004' , '002' , N'天河区')insert into tb values('005' , '003' , N'罗湖区')insert into tb values('006' , '003' , N'福田区')insert into tb values('007' , '003' , N'宝安区')insert into tb values('008' , '007' , N'西乡镇')insert into tb values('009' , '007' , N'龙华镇')insert into tb values('010' , '007' , N'松岗镇')goDECLARE @ID VARCHAR(3)--查询ID = '001'的所有子节点SET @ID = '001';WITH T AS( SELECT ID , PID , NAME FROM TB WHERE ID = @ID UNION ALL SELECT A.ID , A.PID , A.NAME FROM TB AS A JOIN T AS B ON A.PID = B.ID)SELECT * FROM T ORDER BY ID/*ID PID NAME---- ---- ----------001 NULL 广东省002 001 广州市003 001 深圳市004 002 天河区005 003 罗湖区006 003 福田区007 003 宝安区008 007 西乡镇009 007 龙华镇010 007 松岗镇(10 行受影响)*/--查询ID = '002'的所有子节点SET @ID = '002';WITH T AS( SELECT ID , PID , NAME FROM TB WHERE ID = @ID UNION ALL SELECT A.ID , A.PID , A.NAME FROM TB AS A JOIN T AS B ON A.PID = B.ID)SELECT * FROM T ORDER BY ID/*ID PID NAME---- ---- ----------002 001 广州市004 002 天河区(2 行受影响)*/--查询ID = '003'的所有子节点SET @ID = '003';WITH T AS( SELECT ID , PID , NAME FROM TB WHERE ID = @ID UNION ALL SELECT A.ID , A.PID , A.NAME FROM TB AS A JOIN T AS B ON A.PID = B.ID)SELECT * FROM T ORDER BY ID/*ID PID NAME---- ---- ----------003 001 深圳市005 003 罗湖区006 003 福田区007 003 宝安区008 007 西乡镇009 007 龙华镇010 007 松岗镇(7 行受影响)*/drop table tb--注：除ID值不一样外，三个SQL语句是一样的。--===============================================================================declare @t table(id int identity(1,1),parentid int,name varchar(10))insert @t(parentid,name) select 0,'上海市'union all select 1,'虹口区'union all select 1,'徐汇区'union all select 1,'浦东新区'union all select 2,'江湾镇'union all select 2,'虹口足球场'union all select 5,'吉买盛'union all select 5,'易卜莲花'union all select 5,'农工商'union all select 6,'吉买盛'select * from @t;with tb as( select * from @t where id=2 union all select a.* from @t a join tb b on a.parentid=b.id)select * from tborder by id/*(10 行受影响)id parentid name----------- ----------- ----------1 0 上海市2 1 虹口区3 1 徐汇区4 1 浦东新区5 2 江湾镇6 2 虹口足球场7 5 吉买盛8 5 易卜莲花9 5 农工商10 6 吉买盛(10 行受影响)id parentid name----------- ----------- ----------2 1 虹口区5 2 江湾镇6 2 虹口足球场7 5 吉买盛8 5 易卜莲花9 5 农工商10 6 吉买盛(7 行受影响)*/--============================================================================drop table tbgocreate table tb(code int,su_code int)insert into tb(code,su_code) values(1,null)insert into tb(code,su_code) values(11,1)insert into tb(code,su_code) values(12,1)insert into tb(code,su_code) values(111,11)insert into tb(code,su_code) values(112,11)insert into tb(code,su_code) values(121,12)insert into tb(code,su_code) values(122,12)insert into tb(code,su_code) values(1221,122)gocreate table #stack(item int,levels int)delete from #stackset nocount ongodeclare @top intdeclare @level intdeclare @line varchar(128)select @top=code from tb where su_code is nullinsert into #stack values(@top,1)select @level=1while @level> 0begin if exists(select * from #stack where levels=@level) begin select @top=item from #stack where levels=@level select @line=space(@level-1)+convert(varchar,@top) print @line delete from #stack where levels=@level and item=@top insert into #stack select code,@level+1 from tb where su_code=@top if @@rowcount> 0 select @level=@level+1 endelse select @level=@level-1end--===============================================================================--函数-->Title:Generating test data-->Author:wufeng4552-->Date :2009-09-30 08:52:38set nocount onif object_id('tb','U')is not null drop table tbgocreate table tb(ID int, ParentID int)insert into tb select 1,0 insert into tb select 2,1 insert into tb select 3,1 insert into tb select 4,2 insert into tb select 5,3 insert into tb select 6,5 insert into tb select 7,6-->Title:查找指定節點下的子結點if object_id('Uf_GetChildID')is not null drop function Uf_GetChildIDgocreate function Uf_GetChildID(@ParentID int)returns @t table(ID int)asbegin insert @t select ID from tb where ParentID=@ParentID while @@rowcount<>0 begin insert @t select a.ID from tb a inner join @t b on a.ParentID=b.id and not exists(select 1 from @t where id=a.id) endreturnendgoselect * from dbo.Uf_GetChildID(5)/*ID-----------67*/-->Title:查找指定節點的所有父結點if object_id('Uf_GetParentID')is not null drop function Uf_GetParentIDgocreate function Uf_GetParentID(@ID int)returns @t table(ParentID int)asbegin insert @t select ParentID from tb where ID=@ID while @@rowcount!=0 begin insert @t select a.ParentID from tb a inner join @t b on a.id=b.ParentID and not exists(select 1 from @t where ParentID=a.ParentID) end returnendgoselect * from dbo.Uf_GetParentID(2)/*ParentID-----------10*/--==========================================================================================--测试数据DECLARE @t TABLE(ID char(3),PID char(3),Name nvarchar(10))INSERT @t SELECT '001',NULL ,'山东省'UNION ALL SELECT '002','001','烟台市'UNION ALL SELECT '004','002','招远市'UNION ALL SELECT '003','001','青岛市'UNION ALL SELECT '005',NULL ,'四会市'UNION ALL SELECT '006','005','清远市'UNION ALL SELECT '007','006','小分市'--深度排序显示处理--生成每个节点的编码累计(相同当单编号法的编码)DECLARE @t_Level TABLE(ID char(3),Level int,Sort varchar(8000))DECLARE @Level intSET @Level=0INSERT @t_Level SELECT ID,@Level,IDFROM @tWHERE PID IS NULLWHILE @@ROWCOUNT>0BEGIN SET @Level=@Level+1 INSERT @t_Level SELECT a.ID,@Level,b.Sort+a.ID FROM @t a,@t_Level b WHERE a.PID=b.ID AND b.Level=@Level-1END--显示结果SELECT SPACE(b.Level*2)+'|--'+a.NameFROM @t a,@t_Level bWHERE a.ID=b.IDORDER BY b.Sort/*--结果|--山东省 |--烟台市 |--招远市 |--青岛市|--四会市 |--清远市 |--小分市--*/说明：以上内容均为从其他帖子汇总而来。
