MySQL查询某个字段不重复的所有记录
select a.id,a.ip,a.creationTime from myTable a right join (
select max(id) id from myTable group by ip) b on b.id = a.id
where a.id is not null
或者
select a.* from myTable a right join (
select max(id) id from myTable group by ip) b on b.id = a.id
where a.id is not null
表名为myTable