ZKX's LAB

SQL过滤重复数据问题?在线等! sql 过滤重复数据

2021-04-27知识10

sql查询语句过滤重复数据。 SELECT Id,SiteId,InsertTime,IP,Referrer,UrlFROM(SELECT ROW_NUMBER()OVER(PARTITION BY IP ORDER BY Id DESC)number,Id,SiteId,InsertTime,IP,Referrer,UrlFrom 。

用SQL语句怎么过滤重复数据 有一半是添加表的,因为我没有你的结果集,所以拼了个表变量做为结果集重点在后半部分,处理逻辑是按你的想写的,前提是如果我没有理解错的话这个方法的结果集返回的是每一年的数据,年数递增的,行数以有多少个城市为准,不过我感觉你要这样的结果集没有什么意义declare@tab table(name nvarchar(20),both int)declare@tabtmp table(name nvarchar(20),both int)declare@tabname table(name nvarchar(20))declare@name nvarchar(20)declare@both intinsert into@tabselect N'上海',1996unionselect N'上海',1997unionselect N'北京',1996unionselect N'北京',1997insert into@tabnameselect distinct name from@tabselect top 1@name=name from@tab order by name ascselect@both=MIN(both)from@tabwhile(@name is not null)begininsert into@tabtmpselect@name,@bothupdate@tab set name='' where name=nameset@name=nullselect top 1@name=name from@tab where name<;>;'' order by name ascselect top 1@both=both from@tab where both>;@both order by both ascendselect*from@tabtmp

sql过滤重复数据 select distinct b.id,b.names,b.series,b.prize from(select names,series,max(prize)as prize from tb2 group by names,series)a,(select*from tb2)b where a.names=b.names and a.series=b.series and b.prize=a.prize

#sql sum函数#my sql安装教程#sql 分组查询最新#sql excel应用#sql 模糊匹配中文

随机阅读

qrcode
访问手机版