多表连接出现重复值问题

[hqs19821108]

表mf_tz

TZ_NO(通知单号) TZ_DD（单据日期） MO_NO（制令单号）
TZ001 2010-1-1 MO001
TZ002 2010-1-1 MO001
TZ003 2010-1-1 MO001
TZ004 2010-1-1 MO001
TZ005 2010-1-1 MO001
TZ006 2010-1-3 MO002
TZ007 2010-1-3 MO002
TZ008 2010-1-8 MO003

表TF_wr
wr_no(日报号） ITM(项次) TZ_No(通知单号)
WR001 1 TZ001
WR001 2 TZ002
WR002 1 TZ001
WR002 2 TZ002
WR002 3 TZ003
WR003 1 TZ004
WR003 2 TZ005
WR004 1 TZ006
WR004 2 TZ007
表mk_yg
bil_no(日报号） ItM Yg_nO(操作者)
WR001 1 001
WR001 2 002
WR002 1 003
WR002 2 002
WR002 3 004
WR003 1 005
WR003 2 006
WR004 1 007
WR004 2 008

我想查询成：

TZ_NO(通知单号) TZ_DD（单据日期） MO_NO（制令单号） Yg_no(操作者)
TZ001 2010-1-1 MO001 001，003
TZ002 2010-1-1 MO001 002
TZ003 2010-1-1 MO001 004
TZ004 2010-1-1 MO001 005
TZ005 2010-1-1 MO001 006
TZ006 2010-1-3 MO002 007
TZ007 2010-1-3 MO002 008
TZ008 2010-1-8 MO003 无

请高手赐教

[hqs19821108]

用sql2000语法，不用函数游标什么的，只写sql怎么做呢

[dawugui]

[Quote=引用 4 楼 hqs19821108 的回复:]
用sql2000语法，不用函数游标什么的，只写sql怎么做呢
[/Quote]
2000做不到,2005可以.

[feixianxxx]

[Quote=引用 4 楼 hqs19821108 的回复:]
用sql2000语法，不用函数游标什么的，只写sql怎么做呢
[/Quote]

可以 不过你每组个数不能太多
给你写个 等。。。

[feixianxxx]

此方法有2个地方你可以修改：
1.你的每组操作人员不好太多 我这代码最多一组5人
2.如果你可以用临时表,介意
select distinct t.*,Yg_nO
from mf_tz t left join (TF_wr r left join mk_yg g on r.ITM=g.ITM and g.bil_no=r.wr_no) on t.TZ_NO=r.TZ_No
这个插入临时表
这样代码简洁 而且可以加索引

/*
	*************************************
	*   T-MAC 小编                      *
	*        -->努力成长中              *
	*        -->梦想DBA                 *
	*************************************
*/
if OBJECT_ID('mf_tz') is not null
	drop table mf_tz 
go
create table mf_tz (TZ_NO varchar(10) , TZ_DD datetime ,MO_NO varchar(10))
insert mf_tz select 
'TZ001', '2010-1-1','MO001' union select 
'TZ002', '2010-1-1', 'MO001'union select 
'TZ003', '2010-1-1', 'MO001'union select 
'TZ004', '2010-1-1', 'MO001'union select 
'TZ005', '2010-1-1', 'MO001'union select 
'TZ006', '2010-1-3', 'MO002'union select 
'TZ007', '2010-1-3', 'MO002'union select 
'TZ008', '2010-1-8', 'MO003'
go
if OBJECT_ID('TF_wr') is not null
	drop table TF_wr 
go
create table TF_wr (wr_no varchar(10) ,  ITM int  ,TZ_No varchar(10))
insert TF_wr select 
'WR001', 1, 'TZ001' union select 
'WR001', 2, 'TZ002' union select 
'WR002', 1, 'TZ001' union select 
'WR002', 2, 'TZ002' union select 
'WR002', 3, 'TZ003' union select 
'WR003', 1, 'TZ004' union select 
'WR003' ,2, 'TZ005' union select 
'WR004' ,1, 'TZ006' union select 
'WR004' ,2, 'TZ007'
go
if OBJECT_ID('mk_yg') is not null
	drop table mk_yg
go
create table mk_yg (bil_no varchar(10) ,  ITM int  ,Yg_nO varchar(10))
insert mk_yg select
'WR001' ,1 ,'001' union select 
'WR001' ,2 ,'002' union select
'WR002' ,1 ,'003' union select
'WR002' ,2 ,'002' union select
'WR002' ,3 ,'004' union select
'WR003',1 ,'005'  union select
'WR003' ,2 ,'006' union select
'WR004' ,1 ,'007'union select
'WR004' ,2 ,'008'
go
select TZ_NO,TZ_DD,MO_NO,
Yg_nO=MAX(case when rn=1 then Yg_nO     else '' end)+
      MAX(case when rn=2 then ','+Yg_nO else '' end)+
      MAX(case when rn=3 then ','+Yg_nO else '' end)+
      MAX(case when rn=4 then ','+Yg_nO else '' end)+
      MAX(case when rn=5 then ','+Yg_nO else '' end)
from (
select TZ_NO,TZ_DD,MO_NO,Yg_nO,
(select COUNT(*) from (select distinct t.*,Yg_nO
from mf_tz t left join (TF_wr r left join  mk_yg g on r.ITM=g.ITM and g.bil_no=r.wr_no) on t.TZ_NO=r.TZ_No)l
where l.MO_NO=k.MO_NO and l.TZ_DD=k.TZ_DD and l.TZ_NO=k.TZ_NO and k.Yg_nO>=l.Yg_nO) as rn
from (
select distinct t.*,Yg_nO
from mf_tz t left join (TF_wr r left join  mk_yg g on r.ITM=g.ITM and g.bil_no=r.wr_no) on t.TZ_NO=r.TZ_No) k) p 
group by TZ_NO,TZ_DD,MO_NO
                       
/*
TZ_NO      TZ_DD                   MO_NO      Yg_nO
---------- ----------------------- ---------- ------------------------------------------------------
TZ001      2010-01-01 00:00:00.000 MO001      001,003
TZ002      2010-01-01 00:00:00.000 MO001      002
TZ003      2010-01-01 00:00:00.000 MO001      004
TZ004      2010-01-01 00:00:00.000 MO001      005
TZ005      2010-01-01 00:00:00.000 MO001      006
TZ006      2010-01-03 00:00:00.000 MO002      007
TZ007      2010-01-03 00:00:00.000 MO002      008
TZ008      2010-01-08 00:00:00.000 MO003      
*/

[dawugui]

需要用到如下合并技术.

/*
标题：按某字段合并字符串之一(简单合并)
作者：爱新觉罗.毓华(十八年风雨,守得冰山雪莲花开)
时间：2008-11-06
地点：广东深圳

描述：将如下形式的数据按id字段合并value字段。
id    value
----- ------
1     aa
1     bb
2     aaa
2     bbb
2     ccc
需要得到结果：
id     value
------ -----------
1      aa,bb
2      aaa,bbb,ccc
即：group by id, 求 value 的和（字符串相加）
*/
--1、sql2000中只能用自定义的函数解决
create table tb(id int, value varchar(10))
insert into tb values(1, 'aa')
insert into tb values(1, 'bb')
insert into tb values(2, 'aaa')
insert into tb values(2, 'bbb')
insert into tb values(2, 'ccc')
go

create function dbo.f_str(@id int) returns varchar(100)
as
begin
    declare @str varchar(1000)
    set @str = ''
    select @str = @str + ',' + cast(value as varchar) from tb where id = @id
    set @str = right(@str , len(@str) - 1)
    return @str
end
go

--调用函数
select id , value = dbo.f_str(id) from tb group by id

drop function dbo.f_str
drop table tb


--2、sql2005中的方法
create table tb(id int, value varchar(10))
insert into tb values(1, 'aa')
insert into tb values(1, 'bb')
insert into tb values(2, 'aaa')
insert into tb values(2, 'bbb')
insert into tb values(2, 'ccc')
go

select id, [value] = stuff((select ',' + [value] from tb t where id = tb.id for xml path('')) , 1 , 1 , '')
from tb
group by id

drop table tb


--3、使用游标合并数据
create table tb(id int, value varchar(10))
insert into tb values(1, 'aa')
insert into tb values(1, 'bb')
insert into tb values(2, 'aaa')
insert into tb values(2, 'bbb')
insert into tb values(2, 'ccc')
go
declare @t table(id int,value varchar(100))--定义结果集表变量
--定义游标并进行合并处理
declare my_cursor cursor local for
select id , value from tb
declare @id_old int , @id int , @value varchar(10) , @s varchar(100)
open my_cursor
fetch my_cursor into @id , @value
select @id_old = @id , @s=''
while @@FETCH_STATUS = 0
begin
    if @id = @id_old
       select @s = @s + ',' + cast(@value as varchar)
    else
      begin
        insert @t values(@id_old , stuff(@s,1,1,''))
        select @s = ',' + cast(@value as varchar) , @id_old = @id
      end
    fetch my_cursor into @id , @value
END
insert @t values(@id_old , stuff(@s,1,1,''))
close my_cursor
deallocate my_cursor

select * from @t
drop table tb

[--小F--]

;with f as
(
 select
  a.*,c.Yg_nO
 from
  mf_tz a,TF_wr b,mk_yg c
 where
  b.wr_no=c.bil_no and a.TZ_No=b.TZ_No
)

select
 f.*, [Yg_nO] = stuff((select ',' + [Yg_nO] from f t where TZ_NO = f.TZ_NO for xml path('')) , 1 , 1 , '')
from
 f
group by
 TZ_NO ,TZ_DD,MO_NO

[ws_hgo]

好快...........