数据库sql同时读取两个表

可以这样 select * from 表一 where to_days(datetime) = to_days(now()) and username ='$user'union allselect * from 表二 where to_days(datetime) = to_days(now()) and username ='$user' 如果你非要排序 select t.*from(select * from 表一 where to_days(datetime) =