Question

我在php中运行以下查询：

$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());

它给出了以下错误：

SELECT DISTINCT sub_category FROM phonebook ORDER BY sub_category WHERE category =＆＃39; Administration＆＃39;您的SQL语法有错误;检查与您的MySQL服务器版本相对应的手册，以获得正确的语法，以便在＆＃39; WHERE category =＆＃39; Administration＆＃39;＆＃39;＆＃39;在第1行

我无法理解引号中的错误是什么？

Answer 1

尝试以下方法：

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

进入

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

你犯了错误＆＃34; sub_caregory＆＃34;：

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

Answer 2

ORDER BY应该在关闭之后你做不到

SELECT 
FROM 
OREDER BY
WHERE

ORDER IS

SELECT 
FROM 
WHERE 
GROUP BY 
HAVING 
ORDER BY

Answer 3

尝试以下查询： $ query =＆＃34; SELECT DISTINCT sub_category FROM phonebook WHERE category =＆＃39;＆＃34;。$ link。＆＃34;＆＃39; ORDER BY sub_category＆＃34 ;; 要查看完整的select语句，您可以在此处查看http://dev.mysql.com/doc/refman/5.7/en/select.html

SQL查询中有关引号的错误

3 个答案: