想设计一个招标数据库,在编写存储过程中遇到如下问题表结构如下:
-------------------------
表1:报价情况
报价ID 招标清单ID 报价 供应商ID
1 1 10 1
2 2 15 1
3 3 20 1
4 1 11 2
5 2 15 2
6 3 18 2
-------------------------------
表2:招标清单
招标清单ID 品名 数量
1 a 4
2 b 6
3 c 2
-------------------------------
表3:希望的中标结果
中标ID 品名 数量 报价 供应商ID
1 a 4 10 1
2 b 6 15 1
3 c 2 18 2说明:利用select distinc min(报价) 以及group by 等等,最后总是有4条记录,也就是对于产品b而言,2个供应商报价相同,
但招标结果只能选择一家,希望能够按照供应商编号确定第一家公司中标,请问如何实现?
谢谢各位
-------------------------
表1:报价情况
报价ID 招标清单ID 报价 供应商ID
1 1 10 1
2 2 15 1
3 3 20 1
4 1 11 2
5 2 15 2
6 3 18 2
-------------------------------
表2:招标清单
招标清单ID 品名 数量
1 a 4
2 b 6
3 c 2
-------------------------------
表3:希望的中标结果
中标ID 品名 数量 报价 供应商ID
1 a 4 10 1
2 b 6 15 1
3 c 2 18 2说明:利用select distinc min(报价) 以及group by 等等,最后总是有4条记录,也就是对于产品b而言,2个供应商报价相同,
但招标结果只能选择一家,希望能够按照供应商编号确定第一家公司中标,请问如何实现?
谢谢各位
(爱新觉罗.毓华 2007-10-23于浙江杭州)
/*
数据如下:
name val memo
a 2 a2(a的第二个值)
a 1 a1--a的第一个值
a 3 a3:a的第三个值
b 1 b1--b的第一个值
b 3 b3:b的第三个值
b 2 b2b2b2b2
b 4 b4b4
b 5 b5b5b5b5b5
*/
--创建表并插入数据:
create table tb(name varchar(10),val int,memo varchar(20))
insert into tb values('a', 2, 'a2(a的第二个值)')
insert into tb values('a', 1, 'a1--a的第一个值')
insert into tb values('a', 3, 'a3:a的第三个值')
insert into tb values('b', 1, 'b1--b的第一个值')
insert into tb values('b', 3, 'b3:b的第三个值')
insert into tb values('b', 2, 'b2b2b2b2')
insert into tb values('b', 4, 'b4b4')
insert into tb values('b', 5, 'b5b5b5b5b5')
go--一、按name分组取val最大的值所在行的数据。
--方法1:
select a.* from tb a where val = (select max(val) from tb where name = a.name) order by a.name
--方法2:
select a.* from tb a where not exists(select 1 from tb where name = a.name and val > a.val)
--方法3:
select a.* from tb a,(select name,max(val) val from tb group by name) b where a.name = b.name and a.val = b.val order by a.name
--方法4:
select a.* from tb a inner join (select name , max(val) val from tb group by name) b on a.name = b.name and a.val = b.val order by a.name
--方法5
select a.* from tb a where 1 > (select count(*) from tb where name = a.name and val > a.val ) order by a.name
/*
name val memo
---------- ----------- --------------------
a 3 a3:a的第三个值
b 5 b5b5b5b5b5
*/--二、按name分组取val最小的值所在行的数据。
--方法1:
select a.* from tb a where val = (select min(val) from tb where name = a.name) order by a.name
--方法2:
select a.* from tb a where not exists(select 1 from tb where name = a.name and val < a.val)
--方法3:
select a.* from tb a,(select name,min(val) val from tb group by name) b where a.name = b.name and a.val = b.val order by a.name
--方法4:
select a.* from tb a inner join (select name , min(val) val from tb group by name) b on a.name = b.name and a.val = b.val order by a.name
--方法5
select a.* from tb a where 1 > (select count(*) from tb where name = a.name and val < a.val) order by a.name
/*
name val memo
---------- ----------- --------------------
a 1 a1--a的第一个值
b 1 b1--b的第一个值
*/--三、按name分组取第一次出现的行所在的数据。
select a.* from tb a where val = (select top 1 val from tb where name = a.name) order by a.name
/*
name val memo
---------- ----------- --------------------
a 2 a2(a的第二个值)
b 1 b1--b的第一个值
*/--四、按name分组随机取一条数据。
select a.* from tb a where val = (select top 1 val from tb where name = a.name order by newid()) order by a.name
/*
name val memo
---------- ----------- --------------------
a 1 a1--a的第一个值
b 5 b5b5b5b5b5
*/--五、按name分组取最小的两个(N个)val
select a.* from tb a where 2 > (select count(*) from tb where name = a.name and val < a.val ) order by a.name,a.val
select a.* from tb a where val in (select top 2 val from tb where name=a.name order by val) order by a.name,a.val
select a.* from tb a where exists (select count(*) from tb where name = a.name and val < a.val having Count(*) < 2) order by a.name
/*
name val memo
---------- ----------- --------------------
a 1 a1--a的第一个值
a 2 a2(a的第二个值)
b 1 b1--b的第一个值
b 2 b2b2b2b2
*/--六、按name分组取最大的两个(N个)val
select a.* from tb a where 2 > (select count(*) from tb where name = a.name and val > a.val ) order by a.name,a.val
select a.* from tb a where val in (select top 2 val from tb where name=a.name order by val desc) order by a.name,a.val
select a.* from tb a where exists (select count(*) from tb where name = a.name and val > a.val having Count(*) < 2) order by a.name
/*
name val memo
---------- ----------- --------------------
a 2 a2(a的第二个值)
a 3 a3:a的第三个值
b 4 b4b4
b 5 b5b5b5b5b5
*/
--七,如果整行数据有重复,所有的列都相同。
/*
数据如下:
name val memo
a 2 a2(a的第二个值)
a 1 a1--a的第一个值
a 1 a1--a的第一个值
a 3 a3:a的第三个值
a 3 a3:a的第三个值
b 1 b1--b的第一个值
b 3 b3:b的第三个值
b 2 b2b2b2b2
b 4 b4b4
b 5 b5b5b5b5b5
*/
--在sql server 2000中只能用一个临时表来解决,生成一个自增列,先对val取最大或最小,然后再通过自增列来取数据。
--创建表并插入数据:
create table tb(name varchar(10),val int,memo varchar(20))
insert into tb values('a', 2, 'a2(a的第二个值)')
insert into tb values('a', 1, 'a1--a的第一个值')
insert into tb values('a', 1, 'a1--a的第一个值')
insert into tb values('a', 3, 'a3:a的第三个值')
insert into tb values('a', 3, 'a3:a的第三个值')
insert into tb values('b', 1, 'b1--b的第一个值')
insert into tb values('b', 3, 'b3:b的第三个值')
insert into tb values('b', 2, 'b2b2b2b2')
insert into tb values('b', 4, 'b4b4')
insert into tb values('b', 5, 'b5b5b5b5b5')
goselect * , px = identity(int,1,1) into tmp from tbselect m.name,m.val,m.memo from
(
select t.* from tmp t where val = (select min(val) from tmp where name = t.name)
) m where px = (select min(px) from
(
select t.* from tmp t where val = (select min(val) from tmp where name = t.name)
) n where n.name = m.name)drop table tb,tmp/*
name val memo
---------- ----------- --------------------
a 1 a1--a的第一个值
b 1 b1--b的第一个值(2 行受影响)
*/
--在sql server 2005中可以使用row_number函数,不需要使用临时表。
--创建表并插入数据:
create table tb(name varchar(10),val int,memo varchar(20))
insert into tb values('a', 2, 'a2(a的第二个值)')
insert into tb values('a', 1, 'a1--a的第一个值')
insert into tb values('a', 1, 'a1--a的第一个值')
insert into tb values('a', 3, 'a3:a的第三个值')
insert into tb values('a', 3, 'a3:a的第三个值')
insert into tb values('b', 1, 'b1--b的第一个值')
insert into tb values('b', 3, 'b3:b的第三个值')
insert into tb values('b', 2, 'b2b2b2b2')
insert into tb values('b', 4, 'b4b4')
insert into tb values('b', 5, 'b5b5b5b5b5')
goselect m.name,m.val,m.memo from
(
select * , px = row_number() over(order by name , val) from tb
) m where px = (select min(px) from
(
select * , px = row_number() over(order by name , val) from tb
) n where n.name = m.name)drop table tb/*
name val memo
---------- ----------- --------------------
a 1 a1--a的第一个值
b 1 b1--b的第一个值(2 行受影响)
*/
表2.数量
FROM 表1 INNER JOIN
表2 ON 表1.招标清单ID = 表2.招标清单ID
WHERE 报价 =(select distinct min(报价) from 表1 where 表1.招标清单ID = 表2.招标清单ID)
order by 品名,表1.供应商ID
----------------------------------但是有重复记录
SELECT min(表1.供应商ID), 表1.报价, 表2.品名,
表2.数量
FROM 表1 INNER JOIN
表2 ON 表1.招标清单ID = 表2.招标清单ID
WHERE 报价 =(select distinct min(报价) from 表1 where 表1.招标清单ID = 表2.招标清单ID)
order by 品名,表1.供应商ID
group by 品名
USE [database]
GO
/****** 对象: StoredProcedure [dbo].[bd_CreatStock_temp] 脚本日期: 09/11/2008 16:34:08 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GOALTER PROCEDURE [dbo].[bd_CreatStock_temp]
-- Add the parameters for the stored procedure here
@PurchaseBatch varchar(10)
AS
BEGIN
CREATE TABLE [dbo].[BD_Stock_tmp](
[MedicineID] [int] NOT NULL, ----药品ID
[SupplierID] [int] NOT NULL,
[LowestQuotation] [money] NOT NULL, ----供应商id
[WinningSupplierID] [int] NULL, ----中标供应商ID
[PurchasingPrice] [money] NULL, ----中标价
[ConcludedDate] [datetime] NULL, ----采购日期
[PurchaseBatch] [nvarchar](10) NULL, ----采购批次
[Decrypt] [nvarchar](255) NULL, ----备注
[Number1] [int] NULL, ----分散采购数量1
[Number2] [int] NULL) ----分散采购数量2 ---------------------------------
INSERT INTO BD_Stock_tmp
(SupplierID, LowestQuotation, Decrypt, MedicineID, Number1, Number2, ConcludedDate,
PurchaseBatch,WinningSupplierID,PurchasingPrice)
SELECT BD_quotedprice.SupplierID, BD_quotedprice.Price, BD_quotedprice.Decrypt, BD_PurchaseList.MedicineID,
BD_PurchaseList.Number1, BD_PurchaseList.Number2,getdate(),@PurchaseBatch,SupplierID,Price
FROM BD_quotedprice INNER JOIN
BD_PurchaseList ON BD_quotedprice.PurchaseListId = BD_PurchaseList.PurchaseListID
WHERE Price =(select distinct min(Price) from BD_quotedprice where BD_PurchaseList.PurchaseBatch = @PurchaseBatch
and BD_quotedprice.PurchaseListId = BD_PurchaseList.PurchaseListID)
order by MedicineID,BD_quotedprice.SupplierID
--------------------
INSERT INTO BD_Stock
(MedicineID, SupplierID, LowestQuotation, WinningSupplierID, PurchasingPrice, ConcludedDate, PurchaseBatch, Decrypt, Number1, Number2)
SELECT MedicineID, SupplierID, LowestQuotation, WinningSupplierID, PurchasingPrice, ConcludedDate, PurchaseBatch, Decrypt, Number1, Number2
FROM BD_Stock_tmpDROP TABLE BD_Stock_tmp
END