下面我们来看下，如何利用它来删除一个表中重复记录
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，希望对您有所帮助。