tp3 联表查询

D("column")
            ->field("{$DbPrefix}column.pid,{$DbPrefix}news.*")
            ->where(array("{$DbPrefix}news.style"=>"woman"))
            ->order("id desc")
            ->limit(20)
            ->join("__NEWS__ on __NEWS__.pid = __NEWS__.pid")
            ->select();

原文地址：https://www.cnblogs.com/bubaya/p/9007604.html