如何利用row_number函数处理重复数据

王朝other·作者佚名  2008-06-01
窄屏简体版  字體: |||超大  

创建测试表person

CREATE TABLE person(

sn varchar(10),

name varchar(50)

);

go

插入测试重复数据

insert into person values('1','guoqiang1');

insert into person values('1','guoqiang1');

insert into person values('1','guoqiang1');

insert into person values('2','guoqiang2');

insert into person values('2','guoqiang2');

insert into person values('3','guoqiang3');

go

查看person表

select * from dbo.person;

go

去除重复数据,并放到tmp表中

select sn,name into tmp from

(select *, row_number() over(partition by sn order by sn)

as rank from person) as t

where t.rank = 1

go

查看tmp表

select * from dbo.tmp

go

 
 
 
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