查询同一表内多字段同时重复记录的SQL语句

分享下用sql语句删除数据库中重复记录的方法.比如现在有一人员表 (表名:peosons) 若想将姓名.身份证号.住址这三个字段完全相同的记录查询出来select p1.* from persons p1,persons p2 where p1.id<>p2.id and p1.cardid = p2.cardid and p1.pname = p2.pname and p1.address = p2.address可以实现上述效果．几个删除重复记录的SQL语句 1.用rowid方法2.用gr

查询及删除重复记录的SQL语句 1.查找表中多余的重复记录,重复记录是根据单个字段(peopleId)来判断select * from peoplewhere peopleId in (select   peopleId from   people group by   peopleId having count(peopleId) > 1) 2.删除表中多余的重复记录,重复记录是根据单个字段(peopleId)来判断,只留有rowid最小的记录delete from people where

1.表中有id和name 两个字段,查询出name重复的所有数据 1 select * from xi a where (a.username) in (select username from xi group by username having count(*) > 1) 2.查询出所有数据进行分组之后,和重复数据的重复次数的查询数据,先列下: 1 select count(username) as '重复次数',username from xi group by username hav

1.查找表中多余的重复记录,重复记录是根据单个字段(peopleId)来判断 select * from people where peopleId in (select peopleId from people group by peopleId having count(peopleId) > 1) 2.删除表中多余的重复记录,重复记录是根据单个字段(peopleId)来判断,只留有rowid最小的记录 delete from people where peopleId in (select

id sid cid 1 1 12 1 23 2 1 以sid分组,最后取cid最大的那一条,以上要取第2.3条 1 方法一: 2 select * from (select * from table order by cid desc) as a group by a.sid 3 4 方法二: 5 select a.* from table as a where cid = (select max(cid) from table where a.sid = sid) 6 7 方法三: 8 se

1.首先,select top用法: 参考问题  select top n * from和select * from的区别 select * from table --  取所有数据,返回无序集合 select top n * from table  -- 根据表内数据存储顺序取前n条,返回无序集合 select * from table order by id desc -- 取所有数据,按id逆序返回有序列表 select top n * from table order by id des

1.首先.select top使用方法: 參考问题  select top n * from和select * from的差别 select * from table --  取全部数据.返回无序集合 select top n * from table  -- 依据表内数据存储顺序取前n条,返回无序集合 select * from table order by id desc -- 取全部数据.按id逆序返回有序列表 select top n * from table order by id d

查询 select a.* from Base_UserDeptRole a inner join( select DeptRoleId,UserId from Base_UserDeptRole(表) group by DeptRoleId,UserId having count(*)>1) tem on tem.UserId=a.UserId and tem.DeptRoleId=a.DeptRoleId 删除 select distinct DeptRoleId,UserId into #

-- 获得存储过程创建语句 select o.xtype,o.name,cm.text from syscomments cm inner join sysobjects o on o.id=cm.id where xtype ='p' order by o.xtype,o.name,cm.text -- 获得视图程创建语句 select o.xtype,o.name,cm.text from syscomments cm inner join sysobjects o on o.id=cm.i