需要递归查询ID列的 编号集合。供其他查询过程用。应该怎么写。
如何进行sql的递归查询? sql中有没有集合的概念?
------解决方案--------------------
- SQL code
--bom结构,查找节点下所有子节点:create table os(id int,parentid int,desn varchar(10))insert into os select 1,0,'体育用品'insert into os select 2,0,'户外运动'insert into os select 3,1,'篮球'insert into os select 4,1,'足球'insert into os select 5,2,'帐篷'insert into os select 6,2,'登山鞋'insert into os select 7,0,'男士用品'insert into os select 8,7,'刮胡刀'insert into os select 9,3,'大号篮球'--求个节点下所有子节点:create function f_cid(@id int)returns varchar(500)asbegin declare @t table(id int,parentid int,desn varchar(10),lev int) declare @lev int set @lev=1 insert into @t select *,@lev from os where [email protected] while(@@rowcount>0) begin set @[email protected]+1 insert into @t select a.*,@lev from os a,@t b where a.parentid=b.id and [email protected] end declare @cids varchar(500) select @cids=isnull(@cids+',','')+ltrim(id) from @t order by lev return @cidsendgo--调用函数select *,ids=dbo.f_cid(id) from os--得到每个节点路径:create proc wsp2@id intasselect *,cast(' ' as varchar(10)) fullpath into #os from osDECLARE @i int,@j intset @i=0set @j=1select @i=max(parentid) from #osupdate #os set fullpath=id while @j<[email protected]begin update #os set fullpath=a.fullpath+','+ltrim(#os.id) from #os inner join #os a on #os.parentid=a.id where [email protected] set @[email protected]+1endselect * from #osgo--调用存储过程exec wsp2 1----------------------------------------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) as begin 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 return end go --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 tb drop function f_cid----------------------------------------set ANSI_NULLS ONset QUOTED_IDENTIFIER ONgoALTER trigger [tri_updatesalary_Mem_Type] on [dbo].[SalaryIncrease]after insertas declare @i int set @i=@@identity update m set m.Mem_Type=case when s.SMark>500000 then '退休会员'--500000 when s.SMark>400000 then '钻石五级'--400000 when s.SMark>300000 then '钻石四级'--300000 when s.SMark>200000 then '钻石三级'--200000 when s.SMark>100000 then '钻石二级'--100000 when s.SMark>50000 then '钻石一级'--50000 when s.SMark>40000 then '五星级'--40000 when s.SMark>30000 then '四星级'--30000 when s.SMark>20000 then '三星级'--20000 when s.SMark>10000 then '二星级'--10000 when s.SMark>5000 then '一星级'--5000 else '一般VIP会员' endfrom MemberInfo m join (select s.SCardName,sum(s.SMark) as SMark from SalaryIncrease s join inserted i on s.SCardName=i.SCardName group by s.SCardName) s on m.Mem_Num=s.SCardName --if exists(select * from MemberInfo m join inserted i on m.Mem_Num=i.SCardName and m.Mem_Mark>100 ) if exists (select m.SCardName,sum(m.ShopMark)as mark from(select m.SCardName,m.ShopMark from ShoppingMark m join inserted i on m.SCardName=i.SCardNamewhere year(m.SDate)=year(getdate()) and month(m.SDate)=month(getdate())) m group by m.SCardName having sum(m.ShopMark)>100) /**//* --最新的(我写的,上面是整合魅影的)select * from ShoppingMark SM join (select m.SCardName,sum(m.ShopMark) as Mark from ShoppingMark m join inserted i on m.SCardName=i.SCardName group by m.SCardName) s on SM.SCardName=s.ScardName where month(SDate)=month(getdate()) and year(SDate)=year(getdate()) and s.Mark>100*/begin update s set s.SIncease=case --积分大于1000就是星级.所以不用判断是否是星级 when m.Mem_Type<>'一般VIP会员' then s.SMark*0.3 else case when s.SMark>4000 then s.SMark*0.3 -- when s.SMark>4000 then -- 200*0.2+200*0.23+200*0.25+200*0.28+(s.SMark-800)*0.3 when s.SMark>3000 then 1000*0.2+1000*0.23+1000*0.25+(s.SMark-600)*0.28 when s.SMark>2000 then 1000*0.2+100*0.23+(s.SMark-400)*0.25 when s.SMark>1000 then (s.SMark-200)*.023+1000*0.2 else s.SMark*0.2 end end from SalaryIncrease as s join inserted i on s.SCardName=i.SCardName join MemberInfo m on (i.SCardName=m.Mem_Num and [email protected]) or (i.SCardName=m.Mem_Num and s.SIncease=0) end--go--树型结构处理之双编号(广度深度排序)if OBJECTPROPERTY(object_id('tb'),'isusertable')<>0 drop table tbcreate table tb(ybh nvarchar(10),ebh nvarchar(10),beizhu nvarchar(1000))insert tbselect '0001',null,'云南省'union all select '0002','0001','昆明市'union all select '0003','0001','昭通市'union all select '0009','0001','大理市'union all select '0008',null,'四川省'union all select '0004',null,'贵州省'union all select '0005','0002','五华区'union all select '0007','0002','水富县'union all select '0006','0005','西园路192号'union all select '0010','0006','金色梧桐3-702'union all select '0011','0010','昆明越科时空科技有限公司'union all select '0015','0007','两碗乡'union all select '0013','0015','两碗村'union all select '0012','0013','某跨国集团董事长'union all select '0014','0008','成都市' --深度排序(模拟单编码法) declare @level_tt table(ybh nvarchar(1000),ebh nvarchar(1000),level int) declare @level int set @level=0 insert @level_tt(ybh,ebh,level) select ybh,ybh,@level from tb where ebh is null while @@ROWCOUNT>0 begin set @[email protected]+1 insert @level_tt(ybh,ebh,level) select a.ybh,b.ebh+a.ybh,@level from tb a,@level_tt b where a.ebh=b.ybh and [email protected] endselect space(b.level*2)+'----'+a.beizhu,a.*,b.* from tb a,@level_tt b where a.ybh=b.ybh order by b.ebh/*(结果) ybh ebh beizhu ybh ebh level----云南省 0001 NULL 云南省 0001 0001 0 ----昆明市 0002 0001 昆明市 0002 00010002 1 ----五华区 0005 0002 五华区 0005 000100020005 2 ----西园路192号 0006 0005 西园路192号 0006 0001000200050006 3 ----金色梧桐3-702 0010 0006 金色梧桐3-702 0010 00010002000500060010 4 ----昆明越科时空科技有限公司 0011 0010 昆明越科时空科技有限公司 0011 000100020005000600100011 5 ----水富县 0007 0002 水富县 0007 000100020007 2 ----两碗乡 0015 0007 两碗乡 0015 0001000200070015 3 ----两碗村 0013 0015 两碗村 0013 00010002000700150013 4 ----某跨国集团董事长 0012 0013 某跨国集团董事长 0012 000100020007001500130012 5 ----昭通市 0003 0001 昭通市 0003 00010003 1 ----大理市 0009 0001 大理市 0009 00010009 1----贵州省 0004 NULL 贵州省 0004 0004 0----四川省 0008 NULL 四川省 0008 0008 0 ----成都市 0014 0008 成都市 0014 00080014 1 */ --查找子节点(包括本身节点和子节点) declare @level_tt table(ybh nvarchar(1000),ebh nvarchar(1000),level int) declare @level int set @level=0 insert @level_tt(ybh,ebh,level) select ybh,ybh,@level from tb where ybh='0005' while @@ROWCOUNT>0 begin set @[email protected]+1 insert @level_tt(ybh,ebh,level) select a.ybh,b.ebh+a.ybh,@level from tb a,@level_tt b where a.ebh=b.ybh and [email protected] endselect space(b.level*2)+'----'+a.beizhu,a.*,b.* from tb a,@level_tt b where a.ybh=b.ybh order by b.ebh/*(无列名) ybh ebh beizhu ybh ebh level----五华区 0005 0002 五华区 0005 0005 0 ----西园路192号 0006 0005 西园路192号 0006 00050006 1 ----金色梧桐3-702 0010 0006 金色梧桐3-702 0010 000500060010 2 ----昆明越科时空科技有限公司 0011 0010 昆明越科时空科技有限公司 0011 0005000600100011 3*/