下面我们来看下,如何利用它来删除一个表中重复记录:
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!
您可能感兴趣的文章:- SQLSERVER分页查询关于使用Top方式和row_number()解析函数的不同
- SQLServer中Partition By及row_number 函数使用详解
- sqlServer使用ROW_NUMBER时不排序的解决方法
- sqlserver巧用row_number和partition by分组取top数据
- sqlserver2005使用row_number() over分页的实现方法
- SqlServer2005中使用row_number()在一个查询中删除重复记录的方法
- SQLSERVER 2005的ROW_NUMBER、RANK、DENSE_RANK的用法
- sqlserver 通用存储过程分页代码(附使用ROW_NUMBER()和不使用ROW_NUMBER()两种情况性能分析)
- SQL Server中row_number分页查询的用法详解
