SqlServer 2005中使用row_number()在一个查询中删除重复记录
更新时间:2010年09月12日 20:26:24 作者:
在SqlServer2005中,提供了一个row_number()的函数,我们经常用它做DataBase数据分页.
下面我们来看下,如何利用它来删除一个表中重复记录:
If Exists(Select * From tempdb.Information_Schema.Tables Where Table_Name Like '#Temp%')
Drop Table #temp
Create Table #temp ([Id] int, [Name] varchar(50), [Age] int, [Sex] bit default 1)
Go
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(1,'James',25,default)
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(1,'James',25,default)
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(1,'James',25,default)
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(2,'Lisa',24,0)
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(2,'Lisa',24,0)
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(2,'Lisa',24,0)
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(3,'Mirsa',23,0)
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(3,'Mirsa',23,0)
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(3,'Mirsa',23,0)
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(4,'John',26,default)
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(5,'Abraham',28,default)
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(6,'Lincoln',30,default)
Delete T From
(Select Row_Number() Over(Partition By [ID],[Name],[Age],[Sex] order By [ID]) As RowNumber,* From #Temp)T
Where T.RowNumber > 1
Select * From #temp
注意倒数第二句脚本,我们在一个查询实现这个功能.
你可以自己执行T-SQL script 看效果.希望对您开发有帮助!
复制代码 代码如下:
If Exists(Select * From tempdb.Information_Schema.Tables Where Table_Name Like '#Temp%')
Drop Table #temp
Create Table #temp ([Id] int, [Name] varchar(50), [Age] int, [Sex] bit default 1)
Go
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(1,'James',25,default)
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(1,'James',25,default)
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(1,'James',25,default)
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(2,'Lisa',24,0)
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(2,'Lisa',24,0)
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(2,'Lisa',24,0)
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(3,'Mirsa',23,0)
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(3,'Mirsa',23,0)
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(3,'Mirsa',23,0)
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(4,'John',26,default)
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(5,'Abraham',28,default)
Insert Into #temp ([Id] , [Name] , [Age] , [Sex] ) Values(6,'Lincoln',30,default)
Delete T From
(Select Row_Number() Over(Partition By [ID],[Name],[Age],[Sex] order By [ID]) As RowNumber,* From #Temp)T
Where T.RowNumber > 1
Select * From #temp
注意倒数第二句脚本,我们在一个查询实现这个功能.
你可以自己执行T-SQL script 看效果.希望对您开发有帮助!
相关文章
SQLServer2005 Output子句获取刚插入的ID值
SQLServer2005的Output子句获取刚插入的ID值2009-08-08SQL Server 使用 SET FMTONLY ON 获得表的元数据
本文介绍SQL Server2005以及之后的版本,通过 SET FMTONLY ON 获得表的元数据的方法,小伙伴们可以参考一下。2016-05-05SQL Server 2005 Express 安装失败解决办法
本人重装vs2005后,sql sever 2005 express却一直安装不上,造成写好的网页无法运行。多次卸载重装无果2009-03-03简单实用SQL脚本Part SQLServer 2005 链接服务器
SQL Server 2005版本的SSMS中已经有了 服务器对象->链接服务器 的功能点,用户首先创建一个远程DB的链接对象,之后就可以像本地表一样执行表的DML了。2010-09-09
最新评论