查重sql语句

select 姓名,地址,手机号 from a,b where 手机号=手机号

select * from table1 b where bill_id=(select top 1 bill_id from table1 a where exists(select top 1 column1 from table1 where column1=lumn1 group by column1 having count(*)>1 order by column1) and lumn1=lumn1) order by column1SQL语句查询有部份字段重复的第一条数据

SELECT 某一列, COUNT( 某一列 )FROM 表GROUP BY 某一列HAVING COUNT( 某一列 ) 〉1这样查询出来的结果， 就是 有重复， 而且 重复的数量。

你的图中post_content全一样，post_title有两种，这算不算重复呀？我按post_content重复就查找出来。查重：select post_content,post_title from wp_posts group by post_content having count(post_content)>1删除要先将数据查询到临时表中，然后将原表清空，在追加回来。

使用临时表求出重复记录select userid from t_name group by userid having count(*) > 1求出不重复记录select distinct * into #a1 from t_name where userid in select userid from t_name group by userid having count(*) > 1删除重复记录从#a1取出不重复记录

查询重复数据，方法如下：select * from [表A] where id in (select id from [表A] group by id having count(id) >1 )