我的数据库中有一个Order表 里面字段为
orderId productID amount qty
100100 1010101 -100 -1
100100 1010101 100 1
100100 1010102 100 1
100100 1010103 100 1现在 我想查询时 去掉这1010101这两条数据 不是删除 只是想查询时将这两天数据同时剔除 请各位大大 帮助下 谢谢
orderId productID amount qty
100100 1010101 -100 -1
100100 1010101 100 1
100100 1010102 100 1
100100 1010103 100 1现在 我想查询时 去掉这1010101这两条数据 不是删除 只是想查询时将这两天数据同时剔除 请各位大大 帮助下 谢谢
go
create table [Order] (orderId int,productID int,amount int,qty int)
insert into [Order]
select 100100,1010101,-100,-1 union all
select 100100,1010101,100,1 union all
select 100100,1010102,100,1 union all
select 100100,1010103,100,1
select *
from [Order] t
where exists(select 1
from [Order]
where orderId=t.orderId and productID=t.productID
group by orderId having count(*)=1)
/*
orderId productID amount qty
----------- ----------- ----------- -----------
100100 1010102 100 1
100100 1010103 100 1*/
-- Author : htl258(Tony)
-- Date : 2010-04-02 14:59:07
-- Version:Microsoft SQL Server 2008 (SP1) - 10.0.2531.0 (Intel X86)
-- Mar 29 2009 10:27:29
-- Copyright (c) 1988-2008 Microsoft Corporation
-- Developer Edition on Windows NT 5.1 <X86> (Build 2600: Service Pack 2)
--------------------------------------------------------------------------
--> 生成测试数据表:tbIF NOT OBJECT_ID('[tb]') IS NULL
DROP TABLE [tb]
GO
CREATE TABLE [tb]([orderId] INT,[productID] INT,[amount] INT,[qty] INT)
INSERT [tb]
SELECT 100100,1010101,-100,-1 UNION ALL
SELECT 100100,1010101,100,1 UNION ALL
SELECT 100100,1010102,100,1 UNION ALL
SELECT 100100,1010103,100,1
GO
--SELECT * FROM [tb]-->SQL查询如下:select * from tb t
where not exists(
select 1 from tb
where ([productID]=t.[productID] and t.amount<>amount)
or ([productID]=t.[productID] and amount<>t.amount))
/*
orderId productID amount qty
----------- ----------- ----------- -----------
100100 1010102 100 1
100100 1010103 100 1(2 行受影响)
*/
insert #test select 100100,1010101,100,1
insert #test select 100100,1010102,100,1
insert #test select 100100,1010103,100,1select * from #test a
where not exists(select 1 from #test where a.orderId=orderId and
a.productID=productID group by productID having count(*)>=2)orderId productID amount qty
----------- ----------- ----------- -----------
100100 1010102 100 1
100100 1010103 100 1(2 行受影响)
from [Order] o
where not exists (select 1 from [Order] where productID=o.productID and amount!=o.amount)
from ta
where productID not in(select productID from ta group by productID having count(1)>1)
/******************************************************************************************************************************************************
1、Num、Name相同的重复值记录,没有大小关系只保留一条
2、Name相同,ID有大小关系时,保留大或小其中一个记录
整理人:中国风(Roy)日期:2008.06.06
******************************************************************************************************************************************************/--1、用于查询重复处理记录(如果列没有大小关系时2000用生成自增列和临时表处理,SQL2005用row_number函数处理)--> --> (Roy)生成測試數據
if not object_id('Tempdb..#T') is null
drop table #T
Go
Create table #T([ID] int,[Name] nvarchar(1),[Memo] nvarchar(2))
Insert #T
select 1,N'A',N'A1' union all
select 2,N'A',N'A2' union all
select 3,N'A',N'A3' union all
select 4,N'B',N'B1' union all
select 5,N'B',N'B2'
Go
--I、Name相同ID最小的记录(推荐用1,2,3),方法3在SQl05时,效率高于1、2
方法1:
Select * from #T a where not exists(select 1 from #T where Name=a.Name and ID<a.ID)方法2:
select a.* from #T a join (select min(ID)ID,Name from #T group by Name) b on a.Name=b.Name and a.ID=b.ID方法3:
select * from #T a where ID=(select min(ID) from #T where Name=a.Name)方法4:
select a.* from #T a join #T b on a.Name=b.Name and a.ID>=b.ID group by a.ID,a.Name,a.Memo having count(1)=1 方法5:
select * from #T a group by ID,Name,Memo having ID=(select min(ID)from #T where Name=a.Name)方法6:
select * from #T a where (select count(1) from #T where Name=a.Name and ID<a.ID)=0方法7:
select * from #T a where ID=(select top 1 ID from #T where Name=a.name order by ID)方法8:
select * from #T a where ID!>all(select ID from #T where Name=a.Name)方法9(注:ID为唯一时可用):
select * from #T a where ID in(select min(ID) from #T group by Name)--SQL2005:方法10:
select ID,Name,Memo from (select *,min(ID)over(partition by Name) as MinID from #T a)T where ID=MinID方法11:select ID,Name,Memo from (select *,row_number()over(partition by Name order by ID) as MinID from #T a)T where MinID=1生成结果:
/*
ID Name Memo
----------- ---- ----
1 A A1
4 B B1(2 行受影响)
*/
--II、Name相同ID最大的记录,与min相反:
方法1:
Select * from #T a where not exists(select 1 from #T where Name=a.Name and ID>a.ID)方法2:
select a.* from #T a join (select max(ID)ID,Name from #T group by Name) b on a.Name=b.Name and a.ID=b.ID order by ID方法3:
select * from #T a where ID=(select max(ID) from #T where Name=a.Name) order by ID方法4:
select a.* from #T a join #T b on a.Name=b.Name and a.ID<=b.ID group by a.ID,a.Name,a.Memo having count(1)=1 方法5:
select * from #T a group by ID,Name,Memo having ID=(select max(ID)from #T where Name=a.Name)方法6:
select * from #T a where (select count(1) from #T where Name=a.Name and ID>a.ID)=0方法7:
select * from #T a where ID=(select top 1 ID from #T where Name=a.name order by ID desc)方法8:
select * from #T a where ID!<all(select ID from #T where Name=a.Name)方法9(注:ID为唯一时可用):
select * from #T a where ID in(select max(ID) from #T group by Name)--SQL2005:方法10:
select ID,Name,Memo from (select *,max(ID)over(partition by Name) as MinID from #T a)T where ID=MinID方法11:
select ID,Name,Memo from (select *,row_number()over(partition by Name order by ID desc) as MinID from #T a)T where MinID=1生成结果2:
/*
ID Name Memo
----------- ---- ----
3 A A3
5 B B2(2 行受影响)
*/--2、删除重复记录有大小关系时,保留大或小其中一个记录
--> --> (Roy)生成測試數據if not object_id('Tempdb..#T') is null
drop table #T
Go
Create table #T([ID] int,[Name] nvarchar(1),[Memo] nvarchar(2))
Insert #T
select 1,N'A',N'A1' union all
select 2,N'A',N'A2' union all
select 3,N'A',N'A3' union all
select 4,N'B',N'B1' union all
select 5,N'B',N'B2'
Go--I、Name相同ID最小的记录(推荐用1,2,3),保留最小一条
方法1:
delete a from #T a where exists(select 1 from #T where Name=a.Name and ID<a.ID)方法2:
delete a from #T a left join (select min(ID)ID,Name from #T group by Name) b on a.Name=b.Name and a.ID=b.ID where b.Id is null方法3:
delete a from #T a where ID not in (select min(ID) from #T where Name=a.Name)方法4(注:ID为唯一时可用):
delete a from #T a where ID not in(select min(ID)from #T group by Name)方法5:
delete a from #T a where (select count(1) from #T where Name=a.Name and ID<a.ID)>0方法6:
delete a from #T a where ID<>(select top 1 ID from #T where Name=a.name order by ID)方法7:
delete a from #T a where ID>any(select ID from #T where Name=a.Name)select * from #T生成结果:
/*
ID Name Memo
----------- ---- ----
1 A A1
4 B B1(2 行受影响)
*/
--II、Name相同ID保留最大的一条记录:方法1:
delete a from #T a where exists(select 1 from #T where Name=a.Name and ID>a.ID)方法2:
delete a from #T a left join (select max(ID)ID,Name from #T group by Name) b on a.Name=b.Name and a.ID=b.ID where b.Id is null方法3:
delete a from #T a where ID not in (select max(ID) from #T where Name=a.Name)方法4(注:ID为唯一时可用):
delete a from #T a where ID not in(select max(ID)from #T group by Name)方法5:
delete a from #T a where (select count(1) from #T where Name=a.Name and ID>a.ID)>0方法6:
delete a from #T a where ID<>(select top 1 ID from #T where Name=a.name order by ID desc)方法7:
delete a from #T a where ID<any(select ID from #T where Name=a.Name)
select * from #T
/*
ID Name Memo
----------- ---- ----
3 A A3
5 B B2(2 行受影响)
*/--3、删除重复记录没有大小关系时,处理重复值
--> --> (Roy)生成測試數據
if not object_id('Tempdb..#T') is null
drop table #T
Go
Create table #T([Num] int,[Name] nvarchar(1))
Insert #T
select 1,N'A' union all
select 1,N'A' union all
select 1,N'A' union all
select 2,N'B' union all
select 2,N'B'
Go方法1:
if object_id('Tempdb..#') is not null
drop table #
Select distinct * into # from #T--排除重复记录结果集生成临时表#truncate table #T--清空表insert #T select * from # --把临时表#插入到表#T中--查看结果
select * from #T/*
Num Name
----------- ----
1 A
2 B(2 行受影响)
*/--重新执行测试数据后用方法2
方法2:alter table #T add ID int identity--新增标识列
go
delete a from #T a where exists(select 1 from #T where Num=a.Num and Name=a.Name and ID>a.ID)--只保留一条记录
go
alter table #T drop column ID--删除标识列--查看结果
select * from #T/*
Num Name
----------- ----
1 A
2 B(2 行受影响)*/--重新执行测试数据后用方法3
方法3:
declare Roy_Cursor cursor local for
select count(1)-1,Num,Name from #T group by Num,Name having count(1)>1
declare @con int,@Num int,@Name nvarchar(1)
open Roy_Cursor
fetch next from Roy_Cursor into @con,@Num,@Name
while @@Fetch_status=0
begin
set rowcount @con;
delete #T where Num=@Num and Name=@Name
set rowcount 0;
fetch next from Roy_Cursor into @con,@Num,@Name
end
close Roy_Cursor
deallocate Roy_Cursor--查看结果
select * from #T
/*
Num Name
----------- ----
1 A
2 B(2 行受影响)
--======= 每天都在进步,却依然追不上地球的自传=========
--======= By: zc_0101 At:2010-04-02 14:59:16=========
--========++++++++++++++++++++++++++++++++++++=========
--> 测试数据: #a
if object_id('tempdb.dbo.#a') is not null drop table #a
create table #a (orderId int,productID int,amount int,qty int)
insert into #a
select 100100,1010101,-100,-1 union all
select 100100,1010101,100,1 union all
select 100100,1010102,100,1 union all
select 100100,1010103,100,1select * from #a
----------------查询------------
select orderid,productID,sum(amount) amount,sum(qty) qty from #a group by orderid,productID having sum(amount)<>0 and sum(qty)<>0----------------结果--------------
/*
orderid productID amount qty
100100 1010102 100 1
100100 1010103 100 1
*/
-- Author :fredrickhu(小F,向高手学习)
-- Date :2010-04-02 14:59:44
-- Verstion:
-- Microsoft SQL Server 2005 - 9.00.4053.00 (Intel X86)
-- May 26 2009 14:24:20
-- Copyright (c) 1988-2005 Microsoft Corporation
-- Developer Edition on Windows NT 5.1 (Build 2600: Service Pack 3)
--
----------------------------------------------------------------
--> 测试数据:[tb]
if object_id('[tb]') is not null drop table [tb]
go
create table [tb]([orderId] int,[productID] int,[amount] int,[qty] int)
insert [tb]
select 100100,1010101,-100,-1 union all
select 100100,1010101,100,1 union all
select 100100,1010102,100,1 union all
select 100100,1010103,100,1
--------------开始查询--------------------------
select * from tb where productID not in(select productID from tb group by productID having count(1)>1)
----------------结果----------------------------
/* orderId productID amount qty
----------- ----------- ----------- -----------
100100 1010102 100 1
100100 1010103 100 1(2 行受影响)*/
from [order] t
where t.amount>0 其实这样最简单
DROP TABLE [tb]
GO
CREATE TABLE [tb]([orderId] INT,[productID] INT,[amount] INT,[qty] INT)
INSERT [tb]
SELECT 100100,1010101,-100,-1 UNION ALL
SELECT 100100,1010101,100,1 UNION ALL
SELECT 100100,1010101,100,1 UNION ALL
SELECT 100100,1010102,100,1 UNION ALL
SELECT 100100,1010102,-100,-1 UNION ALL
SELECT 100100,1010102,100,1 UNION ALL
SELECT 100100,1010103,100,1 UNION ALL
SELECT 100100,1010103,100,-1 UNION ALL
SELECT 100100,1010103,100,-1
GO
--SELECT * FROM [tb]-->SQL查询如下:
;WITH T AS
(
SELECT RN=ROW_NUMBER()OVER(ORDER BY ORDERID,PRODUCTID,AMOUNT),*
FROM TB
)
SELECT orderId,productID,amount,qty
FROM T A
WHERE NOT EXISTS(
SELECT 1 FROM T
WHERE ([ORDERID]=A.[ORDERID] AND [PRODUCTID]=A.[PRODUCTID]
AND (ABS(RN-A.RN)=1 AND (A.QTY+QTY=0))))
/*
rn orderId productID amount qty
-------------------- ----------- ----------- ----------- -----------
3 100100 1010101 100 1
6 100100 1010102 100 1
9 100100 1010103 100 -1(3 行受影响)
*/