SqlServer2005中使用row_number()在一个查询中删除重复记录的方法
2016-02-19 09:18
下面，图老师小编带您去了解一下SqlServer2005中使用row_number()在一个查询中删除重复记录的方法，生活就是不断的发现新事物，get新技能~
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!
作者：Petter Liu
