SQL 查询中有关引号的错误

Question

我正在 运行 关注 php 中的查询：

$link = $_GET['link'];
$query = "SELECT DISTINCT sub_category FROM phonebook ORDER BY sub_category WHERE category = '$link' "; 
echo $query;
$sql = mysql_query($query) or die(mysql_error());

并且出现以下错误：

SELECT DISTINCT sub_category FROM phonebook ORDER BY sub_category WHERE category = 'Administration' You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE category = 'Administration'' at line 1

我无法理解引号中的错误是什么？

Answer 1

尝试以下操作：

$query = "SELECT DISTINCT sub_category FROM phonebook ORDER BY sub_category WHERE category = '$link' ";

进入

$query = "SELECT DISTINCT sub_category FROM phonebook WHERE category = '".$link."' ORDER BY sub_category ";

你犯了错误"sub_caregory":

$query = "SELECT DISTINCT sub_caregory FROM phonebook WHERE category = '".$link."' ORDER BY sub_caregory ";

Answer 2

ORDER BY 应该在 where close 之后 你做不到

SELECT 
FROM 
OREDER BY
WHERE 

订单是

SELECT 
FROM 
WHERE 
GROUP BY 
HAVING 
ORDER BY 

Answer 3

试试下面的查询： $query = "SELECT DISTINCT sub_category FROM phonebook WHERE category = '".$link."' ORDER BY sub_category"; 要查看完整的 select 声明，您可以在此处查看 http://dev.mysql.com/doc/refman/5.7/en/select.html