问一个SQL查询 select op from user group by userid having MAX(time) 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 SELECT userid, username, op, time FROM user GROUP BY userid ORDER BY time DESC; SELECT userid, username, op, time FROM user GROUP BY userid ORDER BY time DESC;试试这个 select * from user where userid in (select userid from user where max(time)) 应该是这样select userid,username,time,op from user where (userid,time) in (select userid,max(time) from user group by userid); 播放音频代码 哪位能够详解一下获得客户端ip地址的经典办法? 关于简化代码的问题...... PHP正则表达式的问题 问个mysql多表查询的排序问题 COOKIE 可以存数组不? 这个cookie好奇怪!@ 谁有 导航图生成工具 在php中,如何能够播放影片,音乐,DVD短片等? 请教一个新人问题 小弟问一个函数执行的次数及效率(不明白函数) 这个错误提示是什么原因导致的,如何解决!
FROM user
GROUP BY userid
ORDER BY time DESC;
FROM user
GROUP BY userid
ORDER BY time DESC;
试试这个
select userid,username,time,op from user where (userid,time) in
(select userid,max(time) from user group by userid);