Question

我有这段代码：

return $this->db->query("SELECT * FROM `messages` where `toid`='$userid' and `fromid`='$userConvensation' or `fromid`='$userid' and `toid`='$userConvensation' order by `id` DESC LIMIT 10");

需要10条最新消息。

但是我需要10条最新消息，但也需要按相反的顺序排列。我怎么能这样做？

输出代码：

foreach($messages->result() as $thisMessage) {
//dostuff
}

Answer 1

子查询怎么样：

<TableRow>
<LinearLayout
    android:id="@+id/linearLayout2"
    android:gravity="center_horizontal"
    android:orientation="vertical"
    android:layout_height="wrap_content"
    android:layout_width="match_parent">

    <Button
        android:id="@+id/button1"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:text="Button"></Button>
</LinearLayout>

Answer 2

包装您的查询并重命名并重新排序。

("SELECT * FROM messages` where toid='$userid' and fromid='$userConvensation' or fromid='$userid' and toid='$userConvensation' 
 order by id DESC LIMIT 10") AS latest ORDER BY id ASC

PHP从mysql逆序

2 个答案: