--递归查询 --生成测试数据 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--创建用户定义函数 create function f_cid(@id varchar(10)) returns varchar(8000) as begin declare @i int , @ret varchar(8000) declare @t table(id varchar(10) , pid varchar(10) , level int) set @i = 1 insert into @t select id , pid , @i from tb where id = @id while @@rowcount <> 0 begin set @i = @i + 1 insert into @t select a.id , a.pid , @i from tb a , @t b where a.pid = b.id and b.level = @i - 1 end select @ret = isnull(@ret , '') + id + ',' from @t return left(@ret , len(@ret) - 1) end go --执行查询 select id , children = isnull(dbo.f_cid(id) , '') from tb group by iddrop table tb drop function f_cid/* id children ---- --------------------------------------- 001 001,002,003,004,005,006,007,008,009,010 002 002,004 003 003,005,006,007,008,009,010 004 004 005 005 006 006 007 007,008,009,010 008 008 009 009 010 010*/(所影响的行数为 10 行) 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') go;with t as ( select id , cid = id from tb union all select t.id , cid = tb.id from t join tb on tb.pid = t.cid ) select id , cid = STUFF((SELECT ',' + rtrim(cid) FROM t WHERE id = tb.id FOR XML PATH('')) , 1 , 1 , '') from tb group by id order by id /* id cid ---- --------------------------------------- 001 001,002,003,005,006,007,008,009,010,004 002 002,004 003 003,005,006,007,008,009,010 004 004 005 005 006 006 007 007,008,009,010 008 008 009 009 010 010(10 行受影响) */;with t as ( select id , name , cid = id , path = cast(name as nvarchar(100)) from tb union all select t.id , t.name , cid = tb.id , path = cast(tb.name as nvarchar(100)) from t join tb on tb.pid = t.cid ) select id , name , cid = STUFF((SELECT ',' + rtrim(cid) FROM t WHERE id = tb.id FOR XML PATH('')) , 1 , 1 , ''), path = STUFF((SELECT ',' + path FROM t WHERE id = tb.id FOR XML PATH('')) , 1 , 1 , '') from tb group by id , name order by id /* id name cid path ---- ---------- ------------------------------------------- --------------------------------------------------------------------- 001 广东省 001,002,003,005,006,007,008,009,010,004 广东省,广州市,深圳市,罗湖区,福田区,宝安区,西乡镇,龙华镇,松岗镇,天河区 002 广州市 002,004 广州市,天河区 003 深圳市 003,005,006,007,008,009,010 深圳市,罗湖区,福田区,宝安区,西乡镇,龙华镇,松岗镇 004 天河区 004 天河区 005 罗湖区 005 罗湖区 006 福田区 006 福田区 007 宝安区 007,008,009,010 宝安区,西乡镇,龙华镇,松岗镇 008 西乡镇 008 西乡镇 009 龙华镇 009 龙华镇 010 松岗镇 010 松岗镇(10 行受影响) */drop table tb
按公司的id和parentid来说: with t as ( select id,parentId from SM_Company where id = @id --查询的公司id union all select e.id,e.parentId from SM_Company as e join t as f on e.parentId = f.id )select id from t
--生成测试数据
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--创建用户定义函数
create function f_cid(@id varchar(10)) returns varchar(8000)
as
begin
declare @i int , @ret varchar(8000)
declare @t table(id varchar(10) , pid varchar(10) , level int)
set @i = 1
insert into @t select id , pid , @i from tb where id = @id
while @@rowcount <> 0
begin
set @i = @i + 1
insert into @t select a.id , a.pid , @i from tb a , @t b where a.pid = b.id and b.level = @i - 1
end
select @ret = isnull(@ret , '') + id + ',' from @t
return left(@ret , len(@ret) - 1)
end
go --执行查询
select id , children = isnull(dbo.f_cid(id) , '') from tb group by iddrop table tb
drop function f_cid/*
id children
---- ---------------------------------------
001 001,002,003,004,005,006,007,008,009,010
002 002,004
003 003,005,006,007,008,009,010
004 004
005 005
006 006
007 007,008,009,010
008 008
009 009
010 010*/(所影响的行数为 10 行)
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')
go;with t as
(
select id , cid = id from tb
union all
select t.id , cid = tb.id
from t join tb on tb.pid = t.cid
)
select id , cid = STUFF((SELECT ',' + rtrim(cid) FROM t WHERE id = tb.id FOR XML PATH('')) , 1 , 1 , '')
from tb
group by id
order by id
/*
id cid
---- ---------------------------------------
001 001,002,003,005,006,007,008,009,010,004
002 002,004
003 003,005,006,007,008,009,010
004 004
005 005
006 006
007 007,008,009,010
008 008
009 009
010 010(10 行受影响)
*/;with t as
(
select id , name , cid = id , path = cast(name as nvarchar(100)) from tb
union all
select t.id , t.name , cid = tb.id , path = cast(tb.name as nvarchar(100))
from t join tb on tb.pid = t.cid
)
select id , name ,
cid = STUFF((SELECT ',' + rtrim(cid) FROM t WHERE id = tb.id FOR XML PATH('')) , 1 , 1 , ''),
path = STUFF((SELECT ',' + path FROM t WHERE id = tb.id FOR XML PATH('')) , 1 , 1 , '')
from tb
group by id , name
order by id
/*
id name cid path
---- ---------- ------------------------------------------- ---------------------------------------------------------------------
001 广东省 001,002,003,005,006,007,008,009,010,004 广东省,广州市,深圳市,罗湖区,福田区,宝安区,西乡镇,龙华镇,松岗镇,天河区
002 广州市 002,004 广州市,天河区
003 深圳市 003,005,006,007,008,009,010 深圳市,罗湖区,福田区,宝安区,西乡镇,龙华镇,松岗镇
004 天河区 004 天河区
005 罗湖区 005 罗湖区
006 福田区 006 福田区
007 宝安区 007,008,009,010 宝安区,西乡镇,龙华镇,松岗镇
008 西乡镇 008 西乡镇
009 龙华镇 009 龙华镇
010 松岗镇 010 松岗镇(10 行受影响)
*/drop table tb
with t as
(
select id,parentId
from SM_Company
where id = @id --查询的公司id
union all
select e.id,e.parentId
from SM_Company as e join t as f on e.parentId = f.id
)select id from t
项目个数
其中城市数目不定,不同的省查出的城市数目不一样,求高手帮忙
项目个数
表差不多就是这个格式