MySQL查询返回资源ID#8而不是期望值

问题描述

我正在尝试发现如何修正查询以返回正确的结果.这是我的查询:

Hi I am trying to discover how to fix my query to return the correct result. Here is my query:

$selectShoeRatingQuery = "SELECT cast(round(AVG(rating)*2)/ 2 as decimal(10,1)) FROM rating WHERE shoe_id = '$_GET[id]'";
$shoeRating = mysql_query($selectShoeRatingQuery);

查询应返回一个小数点后一位数字(3.5).在PhpMyAdmin中进行测试时，它工作正常，但是在我的网站上，它返回resource id #8.

The query should return a number with one decimal place (3.5). It works fine when testing in PhpMyAdmin, however on my site it returns resource id #8.

数据库连接一切正常.

推荐答案

mysql_query返回资源.您需要从中获得一行:

mysql_query returns a resource. You need to get a row from it:

$query = mysql_query($selectShoeRatingQuery);
$row = mysql_fetch_row($query);
$shoeRating = $row[0];

而且，除非您别无选择-请勿使用mysql_套扩展名！他们已被弃用，PDO等人.更好.而且您的查询很容易受到攻击.

And, unless you have no choice - don't use the mysql_ set of extensions! They're deprecated, and PDO et al. are better. And your query is vulnerable.

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