通过本文主要向大家介绍了mysql group order,mysql order by,mysql order by用法,mysql order by limit,mysql order by desc等相关知识,希望本文的分享对您有所帮助
mysql 中order by 与group by的顺序是：
select
from
where
group by
order by
注意：group by 比order by先执行，order by不会对group by 内部进行排序，如果group by后只有一条记录，那么order by 将无效。要查出group by中最大的或最小的某一字段使用 max或min函数。
例：
select sum(click_num) as totalnum,max(update_time) as update_time,count(*) as totalarticle from article_detail where userid =1 group by userid order by update_time desc </div>
select
from
where
group by
order by
注意：group by 比order by先执行，order by不会对group by 内部进行排序，如果group by后只有一条记录，那么order by 将无效。要查出group by中最大的或最小的某一字段使用 max或min函数。
例：
select sum(click_num) as totalnum,max(update_time) as update_time,count(*) as totalarticle from article_detail where userid =1 group by userid order by update_time desc </div>