--查找指定节点的所有子节点的示例函数
--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
--*/
--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
--*/
insert into KiShi values(1, 0, '科室1')
insert into KiShi values(2, 0, '科室2')
insert into KiShi values(3, 1, '科室1.1')
insert into KiShi values(4, 1, '科室1.2')
insert into KiShi values(5, 3, '科室1.1.1')
insert into KiShi values(6, 2, '科室2.1')
insert into KiShi values(7, 3, '科室1.1.2')
insert into KiShi values(8, 5, '科室1.1.1.1')
create table Persons(PersonID varchar(10) , KeID varchar(10) , PersonName varchar(10))
insert into Persons values(1 , 1 , '小A')
insert into Persons values(2 , 3 , '小了')
insert into Persons values(3 , 4 , '小C')
insert into Persons values(4 , 5 , '小丁')
insert into Persons values(5 , 6 , '小E')
insert into Persons values(6 , 5 , '小四')
insert into Persons values(7 , 7 , '小K')
goCREATE FUNCTION f_Cid(@KeID char(10))
RETURNS @t_Level TABLE(keid char(10),Level int)
AS
BEGIN
DECLARE @Level int
SET @Level=1
INSERT @t_Level SELECT @KeID,@Level
WHILE @@ROWCOUNT>0
BEGIN
SET @Level=@Level+1
INSERT @t_Level SELECT a.keid,@Level
FROM kishi a,@t_Level b
WHERE a.Parentid=b.keid
AND b.Level=@Level-1
END
RETURN
END
GOselect m.* from persons m,
(SELECT a.* FROM kishi a , f_Cid('1') b WHERE a.keid = b.keid) n
where m.keid = n.keiddrop function f_Cid
drop table KiShi,persons/*
PersonID KeID PersonName
---------- ---------- ----------
1 1 小A
2 3 小了
3 4 小C
4 5 小丁
6 5 小四
7 7 小K(所影响的行数为 6 行)
*/
insert into KiShi values(1, 0, '科室1')
insert into KiShi values(2, 0, '科室2')
insert into KiShi values(3, 1, '科室1.1')
insert into KiShi values(4, 1, '科室1.2')
insert into KiShi values(5, 3, '科室1.1.1')
insert into KiShi values(6, 2, '科室2.1')
insert into KiShi values(7, 3, '科室1.1.2')
insert into KiShi values(8, 5, '科室1.1.1.1')
create table Persons(PersonID varchar(10) , KeID varchar(10) , PersonName varchar(10))
insert into Persons values(1 , 1 , '小A')
insert into Persons values(2 , 3 , '小了')
insert into Persons values(3 , 4 , '小C')
insert into Persons values(4 , 5 , '小丁')
insert into Persons values(5 , 6 , '小E')
insert into Persons values(6 , 5 , '小四')
insert into Persons values(7 , 7 , '小K')
goCREATE FUNCTION f_Cid(@KeID char(10))
RETURNS @t_Level TABLE(keid char(10),Level int)
AS
BEGIN
DECLARE @Level int
SET @Level=1
INSERT @t_Level SELECT @KeID,@Level
WHILE @@ROWCOUNT>0
BEGIN
SET @Level=@Level+1
INSERT @t_Level SELECT a.keid,@Level
FROM kishi a,@t_Level b
WHERE a.Parentid=b.keid
AND b.Level=@Level-1
END
RETURN
END
GOdeclare @keid as varchar(10)
select @keid = KeID from kishi where KeName = '科室1'
select m.* , n.KeName from persons m,
(SELECT a.* FROM kishi a , f_Cid(@keid) b WHERE a.keid = b.keid) n
where m.keid = n.keiddrop function f_Cid
drop table KiShi,persons/*
PersonID KeID PersonName KeName
---------- ---------- ---------- --------------------
1 1 小A 科室1
2 3 小了 科室1.1
3 4 小C 科室1.2
4 5 小丁 科室1.1.1
6 5 小四 科室1.1.1
7 7 小K 科室1.1.2
(所影响的行数为 6 行)
*/