PK_CORP(公司id) FATHERCORP(上级公司id) UNITNAME(名称) RS (人数)
1001 '' 总部 0
1002 1001 北京 10
1003 1002 天津 10
1004 1003 湖北 10
1005 1002 上海 10
1006 1001 南京 10--如何输入pk_corp,能得到下级公司PK_CORP(包含本身,以及下级的下级)
比如:输入1001 返回所有pk_corp
输入1002 返回 1002,1003,1004,1005
CREATE VIEW v_corp
AS
SELECT '1001' pk_corp ,'' FATHERCORP ,'总部' unitname ,0 rs FROM DUAL
UNION ALL
SELECT '1002' pk_corp ,'1001' FATHERCORP ,'北京' unitname ,10 rs FROM DUAL
UNION ALL
SELECT '1003' pk_corp ,'1002' FATHERCORP ,'天津' unitname,10 rs FROM DUAL
UNION ALL
SELECT '1004' pk_corp ,'1003' FATHERCORP ,'湖北' unitname ,10 rs FROM DUAL
UNION ALL
SELECT '1005' pk_corp ,'1002' FATHERCORP ,'上海' unitname,10 rs FROM DUAL
UNION ALL
SELECT '1006' pk_corp ,'1001' FATHERCORP ,'南京' unitname,10 rs FROM DUAL
1001 '' 总部 0
1002 1001 北京 10
1003 1002 天津 10
1004 1003 湖北 10
1005 1002 上海 10
1006 1001 南京 10--如何输入pk_corp,能得到下级公司PK_CORP(包含本身,以及下级的下级)
比如:输入1001 返回所有pk_corp
输入1002 返回 1002,1003,1004,1005
CREATE VIEW v_corp
AS
SELECT '1001' pk_corp ,'' FATHERCORP ,'总部' unitname ,0 rs FROM DUAL
UNION ALL
SELECT '1002' pk_corp ,'1001' FATHERCORP ,'北京' unitname ,10 rs FROM DUAL
UNION ALL
SELECT '1003' pk_corp ,'1002' FATHERCORP ,'天津' unitname,10 rs FROM DUAL
UNION ALL
SELECT '1004' pk_corp ,'1003' FATHERCORP ,'湖北' unitname ,10 rs FROM DUAL
UNION ALL
SELECT '1005' pk_corp ,'1002' FATHERCORP ,'上海' unitname,10 rs FROM DUAL
UNION ALL
SELECT '1006' pk_corp ,'1001' FATHERCORP ,'南京' unitname,10 rs FROM DUAL
---------- ----------
a b
a c
a e
b b1
b b2
c c1
e e1
e e3
c e9 rows selected.SQL> select * from treeview start with parent='c' connect by child=parent;PARENT CHILD
---------- ----------
c c1
c eSQL> select * from treeview start with parent='c' connect by prior child=parent;PARENT CHILD
---------- ----------
c c1
c e
e e1
e e3
SQL> select distinct
2 ltrim(first_value(sys_connect_by_path(pk_corp,',')) over(order by level desc),',') as new_pk_corp
3 from (
4 select pk_corp,
5 row_number() over(order by pk_corp) as front_values,
6 (row_number() over(order by pk_corp))+1 as behind_values
7 from tablename tt
8 start with pk_corp = 1002
9 connect by prior pk_corp = FATHERCORP
10 )zz
11 connect by prior behind_values = front_values;NEW_PK_CORP
--------------------------------------------------------------------------------
1002,1003,1004,1005
--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 int
SET @Level=0
INSERT @t_Level SELECT ID,@Level,ID
FROM @t
WHERE PID IS NULL
WHILE @@ROWCOUNT>0
BEGIN
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-1
END--显示结果
SELECT SPACE(b.Level*2)+'|--'+a.Name
FROM @t a,@t_Level b
WHERE a.ID=b.ID
ORDER 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
--*/
--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'--广度排序显示处理
--生成每个节点的层次数据
DECLARE @t_Level TABLE(ID char(3),Level int)
DECLARE @Level int
SET @Level=0
INSERT @t_Level SELECT ID,@Level
FROM @t
WHERE PID IS NULL
WHILE @@ROWCOUNT>0
BEGIN
SET @Level=@Level+1
INSERT @t_Level SELECT a.ID,@Level
FROM @t a,@t_Level b
WHERE a.PID=b.ID
AND b.Level=@Level-1
END--显示结果
SELECT a.*
FROM @t a,@t_Level b
WHERE a.ID=b.ID
ORDER BY b.Level,b.ID
/*--结果
ID PID Name
------- --------- ----------
001 NULL 山东省
005 NULL 四会市
002 001 烟台市
003 001 青岛市
006 005 清远市
004 002 招远市
007 006 小分市
--*/
--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--广度搜索排序函数
CREATE FUNCTION f_Sort(@ID char(3)=NULL,@sort int=1)
RETURNS @t_Level TABLE(ID char(3),sort int)
AS
BEGIN
DECLARE tb CURSOR LOCAL
FOR
SELECT ID FROM tb
WHERE PID=@ID
OR(@ID IS NULL AND PID IS NULL)
OPEN TB
FETCH tb INTO @ID
WHILE @@FETCH_STATUS=0
BEGIN
INSERT @t_Level VALUES(@ID,@sort)
SET @sort=@sort+1
IF @@NESTLEVEL<32 --如果递归层数未超过32层(递归最大允许32层)
BEGIN
--递归查找当前节点的子节点
INSERT @t_Level SELECT * FROM f_Sort(@ID,@sort)
SET @sort=@sort+@@ROWCOUNT --排序号加上子节点个数
END
FETCH tb INTO @ID
END
RETURN
END
GO--显示结果
SELECT a.*
FROM tb a,f_Sort(DEFAULT,DEFAULT) b
WHERE a.ID=b.ID
ORDER BY b.sort
/*--结果
ID PID Name
------ --------- ----------
001 NULL 山东省
002 001 烟台市
004 002 招远市
003 001 青岛市
005 NULL 四会市
006 005 清远市
007 006 小分市
--*/
1002 1001 北京 10
1003 1002 天津 10
1004 1003 湖北 10
1005 1002 上海 10start with pk_corp = 1002 中的1002改成需要的pk_corp就行了.
SELECT '1001' pk_corp ,'' FATHERCORP ,'总部' unitname ,0 rs FROM DUAL
UNION ALL
SELECT '1002' pk_corp ,'1001' FATHERCORP ,'北京' unitname ,10 rs FROM DUAL
UNION ALL
SELECT '1003' pk_corp ,'1002' FATHERCORP ,'天津' unitname,10 rs FROM DUAL
UNION ALL
SELECT '1004' pk_corp ,'1003' FATHERCORP ,'湖北' unitname ,10 rs FROM DUAL
UNION ALL
SELECT '1005' pk_corp ,'1002' FATHERCORP ,'上海' unitname,10 rs FROM DUAL
UNION ALL
SELECT '1006' pk_corp ,'1001' FATHERCORP ,'南京' unitname,10 rs FROM DUAL) select * from v_corp start with pk_corp = '1002' connect by prior pk_corp = fathercorp;