怎样查询所有表并按发表时间排序？
例如我做了一个论坛，每个栏目的帖子分别放在单独的表里，我在硬件栏目、软件栏目、编程栏目都分别发了帖子，
现在进入个人中心，要显示出我所有发的贴子，并按发布时间排序，这个怎么做啊？求教啊！
回复讨论(解决方案)
每一个表里都有一个记录发贴人的字段，user,谁发的帖子这个字段里就是谁的用户名
union 数据表。
设计栏目表和帖子表，帖子表关联栏目表，取所有就是取出栏目表所有的子类和父类，以及关联的帖子内容，主要看你表怎么设计表，，，
弄个用户与发贴的关系表，把要查的东西都记录进去，然后就查关系表就OK了
linux_PHP_说的我完全听不懂
用union吧。貌似你的表设计就是有问题的。
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