Php mysqli select where & order by

Question

我在 mysqli_query 的 "order by" 标签有问题。实际上它工作正常但是最后的顺序 returns 只是这个错误：

There was an error: Unknown column 'id' in 'order clause'

$query2 = "SELECT * FROM items WHERE itemownerid = '".$creatorid."' AND game = 1 AND `game_id` = $gameid order by id desc";

Answer 1

实际上，错误本身表明 items table 中不存在 id 列，这就是 order by id 失败的原因。

因此将其更改为有效的列名。一个例子如下：-

$query2 = "SELECT * FROM items WHERE itemownerid = '".$creatorid."' AND game = 1 AND `game_id` = $gameid ORDER BY <write any existing column name of your items table>  DESC";

注意：- 请注意@tadman 建议的评论。非常有用和必要

Php mysqli select where & order by

Php mysqli select where & order by

php

mysql

select

mysqli

sql-order-by