Question

我有一个评论表，其中存储了所有评论，我想显示最近20条评论

$query="SELECT * FROM comment WHERE answerid=$answerid ORDER BY time DESC LIMIT 20";

它给了我最后20个但是从上到下，但我想让它们一直到最顶层。最后评论（按时间）应该最后显示

$result = mysql_query($query);
$newresult = array_reverse($result);
while( $row = mysql_fetch_array($newresult) ) {
    //my code 
    echo $row['content'];
}

但这不起作用？

Answer 1

尝试：

SELECT * FROM (
    SELECT * FROM comment WHERE answerid=$answerid ORDER BY time DESC LIMIT 20
) d ORDER BY time

Answer 2

$query="SELECT * FROM comment WHERE answerid=$answerid ORDER BY time ASC";

Answer 3

ORDER BY id DESC LIMIT 20

如果列id为auto_increment，则此方法正常。您也可以在代码中将DESC更改为ASC！

如何使用mysql查询显示最近20条评论

3 个答案: