SQL Server 去重

一、整行重复
-- 测试数据
drop table tele
create table tele(name varchar(50),tel varchar(11), flag int)
insert into tele(name,tel,flag) values('张三','15010017424',11)
insert into tele(name,tel,flag) values('张三','15010017424',11)
insert into tele(name,tel,flag) values('张三','13975343215',33)
insert into tele(name,tel,flag) values('李四','15010017424',44)
select * from tele
-- 解决办法
select distinct * into #Tmp from tele
drop table tele
select * into tele from #Tmp  --这样生成表可能不太安全？
drop table #Tmp
select * from tele


二、部分重复
1）没有id
-- 测试数据
drop table tele
create table tele(name varchar(50),tel varchar(11), flag int)
insert into tele(name,tel,flag) values('张三','15010017424',11)
insert into tele(name,tel,flag) values('张三','15010017424',22)
insert into tele(name,tel,flag) values('张三','13975343215',33)
insert into tele(name,tel,flag) values('李四','15010017424',44)
select * from tele
-- 方法一，用两张临时表
select identity(int,1,1) as autoid, * into #temp1 from tele