请教SQL查询重复记录的方法 请教SQL查询重复记录的方法。例如有数据表Tb_checkIn有数据列“ID”里有几万条记录,那么如何用SQL语句筛选出6月1日至今列表“ID”里重复的记录? 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 SELECT ID FROM TB WHERE TIME>'20200602' GROUP BY ID HAVING COUNT(1)>1 提示:列名 'TIME' 无效。 汗,这只是我举的例子,具体列名要根据你的表来SELECT ID FROM TB WHERE TIME BETWEEN '20200602' AND GETDATE() GROUP BY ID HAVING COUNT(1)>1 select *from your_table awhere (select count(1) from your_table where id = a.id)>1order by id --换成你的表名吧,加多个时间条件select *from Tb_checkIn awhere (select count(1) from Tb_checkIn where id = a.id)>1and 时间字段 > '20200602'order by id --ID为空?select *from Tb_checkIn awhere (select count(1) from Tb_checkIn where id = a.id)>1and 时间字段 > '20200602'and id is not nullorder by id 不行啊,is not null过滤不掉 你得看是哪个不能为NULL吧自己改 我是这样改的and ZhengJian is not null,但是显示出来还是如下图 ZhengJian is not null AND ZhengJian <>'' select * from table where id in(select id FROM table GROUP BY ID HAVING COUNT(1)>1) where zhaoPian is not null and isnull(ZhengJian,'')<>'' 怎么将null插入数据库int字段(int可为空) 触发器一般都是警告提示吗 mysql 重命名 求一sql语句 存储过程两种写法,怎么不一样呢? 如何用Sql语句在表中指定位置添加字段? SQL触发器问题 高分求如何查询一段时间内的记录? ADO怎樣與數據庫連結? 请教,各位大虾!!!!如何通过程序来配置ODBC中的数据源(sql server 2000)? 求解:用SQL写出不重复记录的查询结果 谈谈GUID的问题!!!!!!!!!!!!
GROUP BY ID HAVING COUNT(1)>1
select *
from your_table a
where (select count(1) from your_table where id = a.id)>1
order by id
--换成你的表名吧,加多个时间条件
select *
from Tb_checkIn a
where (select count(1) from Tb_checkIn where id = a.id)>1
and 时间字段 > '20200602'
order by id
--ID为空?
select *
from Tb_checkIn a
where (select count(1) from Tb_checkIn where id = a.id)>1
and 时间字段 > '20200602'
and id is not null
order by id
不行啊,is not null过滤不掉
and isnull(ZhengJian,'')<>''