请教条sql关于合并相同的类别的
现在的sql为:
select bithasbom,nvrPnNo ,nvrcustno from PnMateLdgH where nvrDocNo = 'MING094114 '
数据为
1PNA504210000009供应商1
1PNA504300000001供应商2
0PNA511230000002供应商3
怎么写才能合并成
1PNA504210000009,PNA504300000001供应商1,供应商2
0PNA511230000002 供应商3
这样的格式
[解决办法]
--带符号合并行列转换
--有表t，其数据如下：
a b
1 1
1 2
1 3
2 1
2 2
3 1
--如何转换成如下结果:
a b
1 1,2,3
2 1,2
3 1
create table tb
(
a int,
b int
)
insert into tb(a,b) values(1,1)
insert into tb(a,b) values(1,2)
insert into tb(a,b) values(1,3)
insert into tb(a,b) values(2,1)
insert into tb(a,b) values(2,2)
insert into tb(a,b) values(3,1)
go
if object_id( 'pubs..f_hb ') is not null
drop function f_hb
go
--创建一个合并的函数
create function f_hb(@a int)
returns varchar(8000)
as
begin
declare @str varchar(8000)
set @str = ' '
select @str = @str + ', ' + cast(b as varchar) from tb where a = @a
set @str = right(@str , len(@str) - 1)
return(@str)
End
go
--调用自定义函数得到结果：
select distinct a ,dbo.f_hb(a) as b from tb
drop table tb
--结果
a b
----------- ------
1 1,2,3
2 1,2
3 1
（所影响的行数为 3 行）
多个前列的合并
数据的原始状态如下：
ID PR CON OP SC
001 p c 差 6
001 p c 好 2
001 p c 一般 4
002 w e 差 8
002 w e 好 7
002 w e 一般 1
===========================
用SQL语句实现，变成如下的数据
ID PR CON OPS
001 p c 差(6),好(2),一般(4)
002 w e 差(8),好(7),一般(1)
if object_id( 'pubs..tb ') is not null
drop table tb
go
create table tb
(
id varchar(10),
pr varchar(10),
con varchar(10),
op varchar(10),
sc int
)
insert into tb(ID,PR,CON,OP,SC) values( '001 ', 'p ', 'c ', '差 ', 6)
insert into tb(ID,PR,CON,OP,SC) values( '001 ', 'p ', 'c ', '好 ', 2)
insert into tb(ID,PR,CON,OP,SC) values( '001 ', 'p ', 'c ', '一般 ', 4)
insert into tb(ID,PR,CON,OP,SC) values( '002 ', 'w ', 'e ', '差 ', 8)
insert into tb(ID,PR,CON,OP,SC) values( '002 ', 'w ', 'e ', '好 ', 7)
insert into tb(ID,PR,CON,OP,SC) values( '002 ', 'w ', 'e ', '一般 ', 1)
go
if object_id( 'pubs..test ') is not null
drop table test
go
select ID,PR,CON , OPS = op + '( ' + cast(sc as varchar(10)) + ') ' into test from tb
--创建一个合并的函数
if object_id( 'pubs..f_hb ') is not null
drop function f_hb
go
create function f_hb(@id varchar(10),@pr varchar(10),@con varchar(10))
returns varchar(8000)
as
begin
declare @str varchar(8000)
set @str = ' '
select @str = @str + ', ' + cast(OPS as varchar) from test where id = @id and @pr = pr and @con = con
set @str = right(@str , len(@str) - 1)
return(@str)
End
go
--调用自定义函数得到结果：
select distinct id ,pr , con , dbo.f_hb(id,pr,con) as OPS from test
drop table tb
drop table test
--结果
id pr con OPS
---------- ---------- ---------- -------------------
001 p c 差(6),好(2),一般(4)
002 w e 差(8),好(7),一般(1)
（所影响的行数为 2 行）
create table b
(col varchar(20))
insert b values ( 'a ')
insert b values ( 'b ')
insert b values ( 'c ')
insert b values ( 'd ')
insert b values ( 'e ')
declare @sql varchar(1024)
set @sql= ' '
select @sql=@sql+b.col+ ', ' from (select col from b) as b
set @sql= 'select ' ' '+@sql+ ' ' ' '
exec(@sql)
[解决办法]
--建立測試環境
Create Table PnMateLdgH
(bithasbomBit,
nvrPnNoVarchar(20),
nvrcustnoNvarchar(20),
nvrDocNoVarchar(20))
Insert PnMateLdgH Select 1, 'PNA504210000009 ',N '供应商1 ', 'MING094114 '
Union All Select 1, 'PNA504300000001 ',N '供应商2 ', 'MING094114 '
Union All Select 0, 'PNA511230000002 ',N '供应商3 ', 'MING094114 '
GO
--建立函數
Create Function F_TEST(@Flag Int, @bithasbom Bit, @nvrDocNo Varchar(20))
Returns Nvarchar(4000)
As
Begin
Declare @S Nvarchar(4000)
Select @S = ' '
Select @S = @S + ', ' + (Case @Flag When 1 Then nvrPnNo Else nvrcustno End) From PnMateLdgH Where nvrDocNo = @nvrDocNo And bithasbom = @bithasbom
Select @S = Stuff(@S, 1, 1, ' ')
Return @S
End
GO
--測試
Select
bithasbom,
dbo.F_TEST(1, bithasbom, nvrDocNo) As nvrPnNo,
dbo.F_TEST(2, bithasbom, nvrDocNo) As nvrcustno
From
PnMateLdgH
Where nvrDocNo = 'MING094114 '
Group By nvrDocNo, bithasbom
GO
--刪除測試環境
Drop Table PnMateLdgH
Drop Function F_TEST
--結果
/*
bithasbomnvrPnNonvrcustno
0PNA511230000002供应商3
1PNA504210000009,PNA504300000001供应商1,供应商2
*/
