sql 递归 部门合计 查询

[jfjff]

create table #t(
layer int, -- 等级
departmentid varchar(10), -- 部门ID
department varchar(40), -- 部门名称
upperid varchar(10) -- 上级部门
)
insert into #t
select 1,'aa','1234','' union all
select 2,'aaa','12345','aa' union all
select 1,'bb','4321','' union all
select 3,'aaaa','123456','aaa' union all
select 2,'bbb','43211','bb' union all
select 3,'bbbb','432112','bbb' union all
select 1,'cc','2341','' union all
select 3,'cccc','23411','ccc' union all
select 2,'ccc','2341111','cc' union all
select 3,'bbc','32123','bb'

计算各部门下有多少个部门
departmentid,department,count(*)

[liangCK]

--测试数据
CREATE TABLE tb(ID char(3),PID char(3),Name nvarchar(10))
INSERT tb 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'
GO

--查询指定节点及其所有子节点的函数
CREATE FUNCTION f_Cid(@ID char(3))
RETURNS @t_Level TABLE(ID char(3),Level int)
AS
BEGIN
	DECLARE @Level int
	SET @Level=1
	INSERT @t_Level SELECT @ID,@Level
	WHILE @@ROWCOUNT>0
	BEGIN
		SET @Level=@Level+1
		INSERT @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002及其所有子节点
SELECT a.*
FROM tb a,f_Cid('002') b
WHERE a.ID=b.ID
/*--结果
ID   PID  Name       
------ ------- ---------- 
002  001  烟台市
004  002  招远市
--*/

[wzy_love_sly]

if object_id('tb') is not null
drop table tb
go
create table tb(
layer int, -- 等级
departmentid varchar(10), -- 部门ID
department varchar(40), -- 部门名称
upperid varchar(10) -- 上级部门
)
insert into tb
select 1,'aa','1234','' union all
select 2,'aaa','12345','aa' union all
select 1,'bb','4321','' union all
select 3,'aaaa','123456','aaa' union all
select 2,'bbb','43211','bb' union all
select 3,'bbbb','432112','bbb' union all
select 1,'cc','2341','' union all
select 3,'cccc','23411','ccc' union all
select 2,'ccc','2341111','cc' union all
select 3,'bbc','32123','bb' 

if object_id('get_count') is not null
drop function get_count
go

CREATE FUNCTION get_count(@ID char(3))
RETURNS int
AS
BEGIN
declare @t_Level TABLE(ID char(20),Level int)
	DECLARE @Level int
	SET @Level=1
	INSERT @t_Level SELECT @ID,@Level
	WHILE @@ROWCOUNT>0
	BEGIN
		SET @Level=@Level+1
		INSERT @t_Level SELECT a.departmentid,@Level
		FROM tb a,@t_Level b
		WHERE a.upperid=b.ID
			AND b.Level=@Level-1
	END
	RETURN (select count(1) from @t_Level )
END
go
select departmentid ,department,
dbo.get_count(departmentid) as 子部门个数
from tb
group by departmentid ,department

departmentid department 子部门个数
aa 1234 3
aaa 12345 2
aaaa 123456 2
bb 4321 4
bbb 43211 2
bbbb 432112 2
bbc 32123 1
cc 2341 3
ccc 2341111 2
cccc 23411 2

[中国风]

;with T
as
(select *,pathfile=cast(departmentid as nvarchar(400))  from #t  a where not exists(select 1 from #t where departmentid=a.upperid)
union all
select a.*,pathfile=cast(b.pathfile+'\'+a.departmentid as nvarchar(400)) from #T a join T b on b.departmentid=a.upperid)
select 	
	a.departmentid,a.department,count(b.layer) as 記錄
from 	
	T a
left join 
	T b on b.pathfile like a.pathfile+'\%'--不包含自身
group by a.departmentid,a.department

departmentid department                               記錄
------------ ---------------------------------------- -----------
aa           1234                                     2
aaa          12345                                    1
aaaa         123456                                   0
cc           2341                                     2
cccc         23411                                    0
ccc          2341111                                  1
bbc          32123                                    0
bb           4321                                     3
bbb          43211                                    1
bbbb         432112                                   0


(10 個資料列受到影響)

[ojuju10]

create table #t( 
layer int, -- 等级 
departmentid varchar(10), -- 部门ID 
department varchar(40), -- 部门名称 
upperid varchar(10) -- 上级部门 
) 
insert into #t 
select 1,'aa','1234','' union all 
select 2,'aaa','12345','aa' union all 
select 1,'bb','4321','' union all 
select 3,'aaaa','123456','aaa' union all 
select 2,'bbb','43211','bb' union all 
select 3,'bbbb','432112','bbb' union all 
select 1,'cc','2341','' union all 
select 3,'cccc','23411','ccc' union all 
select 2,'ccc','2341111','cc' union all 
select 3,'bbc','32123','bb' 


with cet
as
(
select departmentid,department,upperid from #t
union all
select b.departmentid,b.department,b.upperid from cet a,#t b
where b.departmentid=a.upperid
)

select departmentid,department,count(departmentid) as num from cet
group by departmentid,department

/*
departmentid department                               num
------------ ---------------------------------------- -----------
aa           1234                                     3
aaa          12345                                    2
aaaa         123456                                   1
cc           2341                                     3
cccc         23411                                    1
ccc          2341111                                  2
bbc          32123                                    1
bb           4321                                     4
bbb          43211                                    2
bbbb         432112                                   1

(10 行受影响)


/*