维修记录表编号 姓名 维修日期 类别 金额
1 张三 2009-01-01 A 100
2 张三 null A 200
3 李四 2009-02-01 B 0
4 李四 2009-02-15 A 150
5 王麻子 null N 200--------------------------------------
我想得到这样的记录 (只要是同一姓名的,金额要相加,并且姓名不重复,编号必须要)
编号 姓名 日期 类别 金额
1 张三 2009-01-01 A 300 (或者 2 张三 null A 300)
3 李四 2009-02-01 B 150 (或者 4 李四 2009-02-15 A 150)
5 王麻子 null N 200
1 张三 2009-01-01 A 100
2 张三 null A 200
3 李四 2009-02-01 B 0
4 李四 2009-02-15 A 150
5 王麻子 null N 200--------------------------------------
我想得到这样的记录 (只要是同一姓名的,金额要相加,并且姓名不重复,编号必须要)
编号 姓名 日期 类别 金额
1 张三 2009-01-01 A 300 (或者 2 张三 null A 300)
3 李四 2009-02-01 B 150 (或者 4 李四 2009-02-15 A 150)
5 王麻子 null N 200
--处理表重复记录(查询和删除)
/******************************************************************************************************************************************************
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)
*/
编号,
a.姓名,
维修日期,
类别,
b.金额
from 维修表 a join (
select 姓名,SUM(金额)as 金额 from 维修表 group by 姓名) b on a.姓名=b.姓名
where not exists(select * from 维修表 where a.姓名=姓名 and 编号<a.编号)
FROM
TB T
JOIN
(SELECT 姓名, MAX(维修日期)日期 , 类别 ,SUM(金额)金额
FROM TB GROUP BY 姓名, , 类别) AS T1 ON T.姓名=T1.姓名
AND T.类别=T1.类别
AND T.日期=T1. 日期
select 编号, 姓名, 维修日期 , 类别, 金额 =(select sum(金额) from tb where 姓名=a.姓名) into # from tb a select * from # a where not exists(select 1 from # where 姓名=a.姓名 and 编号<a.编号)drop table #
-- -----------t_mac 小编-------------------
--------------------希望有天成为大虾----
-- =========================================IF OBJECT_ID('维修表') IS NOT NULL
DROP TABLE 维修表
GO
CREATE TABLE 维修表( 编号 int,姓名 varchar(10), 维修日期 varchar(10) , 类别 varchar(10) , 金额 int)
go
insert 维修表 SELECT
1, '张三' ,'2009-01-01', 'A' , 100 UNION ALL SELECT
2, '张三' ,null , 'A' , 200 UNION ALL SELECT
3, '李四' ,'2009-02-01' , 'B' , 0 UNION ALL SELECT
4, '李四' ,'2009-02-15' ,'A' , 150 UNION ALL SELECT
5, '王麻子', null , 'N', 200
go
select
编号,
a.姓名,
维修日期,
类别,
b.金额
from 维修表 a join (
select 姓名,SUM(金额)as 金额 from 维修表 group by 姓名) b on a.姓名=b.姓名
where not exists(select * from 维修表 where a.姓名=姓名 and 编号<a.编号)
order by 编号go
/*
编号 姓名 维修日期 类别 金额
----------- ---------- ---------- ---------- -----------
1 张三 2009-01-01 A 300
3 李四 2009-02-01 B 150
5 王麻子 NULL N 200
*/
if OBJECT_ID('维修记录表') is not null drop table 维修记录表
create table 维修记录表(编号 int, 姓名 varchar(20), 维修日期 nvarchar(10), 类别 char(2), 金额 decimal(14,2))insert 维修记录表
select 1, '张三', '2009-01-01', 'A', 100
union all select 2, '张三', null, 'A', 200
union all select 3, '李四', '2009-02-01', 'B', 0
union all select 4, '李四', '2009-02-15', 'A', 150
union all select 5, '王麻子', null, 'N', 200
select min(a.编号) as 编号,a.姓名,max(a.维修日期) as 维修日期,max(a.类别) 类别,SUM(a.金额) as 金额
from 维修记录表 a
group by a.姓名
order by 编号
编号 姓名 维修日期 类别 金额
1 张三 2009-01-01 A 300.00
3 李四 2009-02-15 B 150.00
5 王麻子 NULL N 200.00
*/