摘要:
1、right join # update_time gid=>sid, group_status => s_table select a.* from comment as a right join (select user_id, max(addtime) as maxtime from com 阅读全文
摘要:
相关链接:https://www.jianshu.com/p/c93612b3abac http://www.ruanyifeng.com/blog/2014/02/ssl_tls.html MicroSoft TechNet, SSL/TLS in Detail Jeff Moser, The F 阅读全文