mysql常用_MySQL
- WBOYOriginal
- 2016-06-01 13:06:58947browse
1、mysql 分组取前N记录
select present_price,userid from wx_goods a where 2 > (select count(*) from wx_goods where userid=a.userid and present_price>a.present_price) GROUP BY present_price ORDER BY userid,present_price desc
其中 GROUP BY present_price 是为了去除因比较值重复的情况发生
Statement：
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Previous article：MySql 自适应哈希索引Next article：如果在本地搭一个服务器和mysql数据库环境，如果使用java来访问_MySQL