tp3 联表查询

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();



in查询

$where['pid'] = array('in',array_column($arrID,'id'));
$result = D('news')->where($where)->limit(3)->select();