请各位大侠赐教SQL语句（关于通过报价单生成报价记录）
报价单：
供应商1 报价如下：
产品名称 报价
A 20
B 21
C 22
供应商2报价如下：
产品名称 报价
A 19
B 20
C 21
供应商3报价如下：
产品名称 报价
A 19.5
B 22
供应商1对某产品重新报价如下：
产品名称 报价
A 18.5
B 20
如何得到报价记录
产品名称 供应商1 供应商2 供应商3
A 18.5 19 19.5
B 20 20 22
C 22 21
[解决办法]
一个供应商一个报价表，还是所有供应商都在一个报价表？
[解决办法]
create table #tb (供应商 nvarchar(10),产品名称 nvarchar(10),报价 decimal(10,1))
insert into #tb values('供应商1','A',20)
insert into #tb values('供应商1','B',21)
insert into #tb values('供应商1','C',22)
insert into #tb values('供应商2','A',19)
insert into #tb values('供应商2','B',20)
insert into #tb values('供应商2','C',21)
insert into #tb values('供应商3','A',19.5)
insert into #tb values('供应商3','B',22)
insert into #tb values('供应商1','A',18.5)
insert into #tb values('供应商1','B',20)
--动态sql
declare @sql varchar(8000)
set @sql=''
select @sql=@sql + ',['+rtrim(产品名称)+']=max(case rtrim(产品名称) when '''+rtrim(产品名称)+''' then 报价 end)'
from #tb group by rtrim(产品名称)
exec('select 供应商'+@sql+' from #tb group by 供应商')
drop table #tb
/*
供应商ABC
供应商120.021.022.0
供应商219.020.021.0
供应商319.522.0NULL
*/
CREATE TABLE #temp0 (id INT IDENTITY(1,1),vendor_no CHAR(10),good_no CHAR(10),price DECIMAL(10,2))
INSERT #temp0 (vendor_no,GOOD_NO,price)
SELECT 'VENDOR1','A',20 UNION ALL
SELECT 'VENDOR1','B',21 UNION ALL
SELECT 'VENDOR1','C',22 UNION ALL
SELECT 'VENDOR2','A',19 UNION ALL
SELECT 'VENDOR2','B',20 UNION ALL
SELECT 'VENDOR2','C',21 UNION ALL
SELECT 'VENDOR3','A',19.5 UNION ALL
SELECT 'VENDOR3','B',22 UNION ALL
SELECT 'VENDOR1','A',18.5 UNION ALL
SELECT 'VENDOR1','B',20
SELECT * INTO #temp FROM #temp0 a
WHERE id IN (SELECT MAX(id) FROM #temp0 WHERE vendor_no=a.vendor_no AND good_no=a.good_no)
ORDER BY id
DECLARE @sql VARCHAR(MAX), @colList VARCHAR(MAX)
SET @colList = STUFF(
(
SELECT ','+QUOTENAME(RTRIM(vendor_no))
FROM (SELECT DISTINCT vendor_no FROM #temp) t
FOR XML PATH('')
),1,1,'')
SET @sql = '
select * from (select vendor_no,good_no,price from #temp) a
pivot
(max(price) for vendor_no in('+ @colList +')) b'
EXEC(@sql)
create table 报价主表
(单号 int, 供应商 varchar(10))
create table 报价从表
(单号 int, 产品名称 varchar(10), 价格 decimal(5,1))
insert into 报价主表
select 1,'供应商1' union all
select 2,'供应商2' union all
select 3,'供应商3' union all
select 4,'供应商1'
insert into 报价从表
select 1, 'A', 20 union all
select 1, 'B', 21 union all
select 1, 'C', 22 union all
select 2, 'A', 19 union all
select 2, 'B', 20 union all
select 2, 'C', 21 union all
select 3, 'A', 19.5 union all
select 3, 'B', 22 union all
select 4, 'A', 18.5 union all
select 4, 'B', 20
declare @tsql varchar(6000)
select @tsql=isnull(@tsql+',','')+'['+供应商+']'
from (select distinct 供应商 from 报价主表) t
select @tsql='
with t as
(select a.产品名称,a.价格,b.供应商,
row_number() over(partition by a.产品名称,b.供应商 order by a.单号 desc) ''rn''
from 报价从表 a
inner join 报价主表 b on a.单号=b.单号
)
select 产品名称,'+@tsql+'
from (select 产品名称,供应商,价格 from t where rn=1) a
pivot(max(价格) for 供应商 in('+@tsql+')) b'
exec(@tsql)
/*
产品名称 供应商1 供应商2 供应商3
---------- ------------- ------------- -------------
A 18.5 19.0 19.5
B 20.0 20.0 22.0
C 22.0 21.0 NULL
(3 row(s) affected)
*/
if OBJECT_ID('tempdb..#tempA', 'u') is not null drop table #tempA;
go
create table #tempA( [供应商ID] INT, [供应商名称] varchar(100));
insert #tempA
select '1','供应商1' union all
select '2','供应商2' union all
select '3','供应商3'
if OBJECT_ID('tempdb..#tempB', 'u') is not null drop table #tempB;
go
create table #tempB( [供应商ID] INT, [产品名称] varchar(100), [报价] float);
insert #tempB
select 1, 'A','20' union all
select 1, 'B','21' union all
select 1, 'C','22' union all
select 2, 'A','19' union all
select 2, 'B','20' union all
select 2, 'C','21' union all
select 3, 'A','19.5' union all
select 3, 'B','22' union all
select 1, 'A','18.5' union all
select 1, 'B','20'
--SQL
DECLARE @sql NVARCHAR(MAX), @colList NVARCHAR(MAX)
SET @colList = STUFF((SELECT DISTINCT ','+QUOTENAME(a.[供应商名称]) FROM #tempA a INNER JOIN #tempB b ON a.供应商ID=b.供应商ID FOR XML PATH('')),1,1,'')
SET @sql = N'
select * from
(
SELECT a.供应商名称, a.产品名称, b.报价 FROM
(SELECT DISTINCT a.供应商ID, a.供应商名称, [产品名称] FROM #tempA a inner join #tempB b on a.供应商ID=b.供应商ID) A
OUTER APPLY
(
SELECT TOP(1) * FROM
(SELECT rowid=ROW_NUMBER() OVER(PARTITION BY 供应商ID ORDER BY GETDATE()),* FROM #tempB) m
WHERE m.供应商ID=a.供应商ID AND m.[产品名称]=a.[产品名称] ORDER BY rowid DESC
) B
) a
pivot
(max(报价) for 供应商名称 in('+ @colList +')) b
'
EXEC(@sql)
/*
产品名称供应商1供应商2供应商3
A18.51919.5
B202022
C2221NULL
*/