PHP:
$result = mysql_query("SELECT MAX(something) AS something FROM users");
$row = mysql_fetch_assoc($result);
$max = $row["something"];
echo $max;
MySQL的:
+-----------+----------+ | Something | Name | +-----------+----------+ | 9 | John | | 984 | Somebody | | 1 | Who |
代码结果:9,问题是为什么? Mysql"东西" type是" text"。我的mysql表比上面的大,但它仍然不会产生最大的"东西"。
答案 0 :(得分:1)
对列进行数学运算以触发自动转换
SELECT MAX(something * 1) AS something FROM users#
或使用
明确转换SELECT MAX(cast(something as signed)) AS something FROM users
但更好 - 如果该列仅包含数字,则更改该字段ti int
的数据类型。