簡單ORDER BY子句不能與內工作加入

Question

此查詢根本就沒有排序結果我希望它的方式：

$sql = mysql_query("select s.*, p.label, p.number 
        from `sales` as s 
        left join `pumps` as p on (p.id = s.id_pump) 
        where s.the_date >= UNIX_TIMESTAMP(DATE_SUB(NOW(), INTERVAL 1 DAY)) 
        order by CAST(s.amount_sale AS int) desc 
        limit 1") or die(mysql_error()); 

我得到一個MySQL錯誤。

Answer 1

嘗試鑄造VARCHAR符號整數：

$sql = mysql_query("select s.*, p.label, p.number 
        from `sales` as s 
        left join `pumps` as p on (p.id = s.id_pump) 
        where s.the_date >= UNIX_TIMESTAMP(DATE_SUB(NOW(), INTERVAL 1 DAY)) 
        order by CAST(s.amount_sale AS SIGNED) desc 
        limit 1");