摘要：
例如：帖子的楼数insert into forumposts(themes_id,user_id_posts,posts_content,posts_icon,disable_time,floor_number) values(1,106,'aaa','2.png',1235444,(select max(a.floor_number) from forumposts a where themes_id = 1)+1);如果不加别名的话，报错：You can't specify target table 'forumposts' for 阅读全文
