利用row_number函数处理重复数据

 

利用row_number函数处理重复数据

 

--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