MySQL离开了连接，SQL语法错误

Question

我有一些关于php left join的问题

php给我写了一个错误

  

您的SQL语法有错误;检查手册   对应于您的MySQL服务器版本，以便使用正确的语法   靠近'FROM ipb_topics t LEFT JOIN ipb_posts p ON p.topic_id = t.tid   LEFT JOIN ipb_at'第12行

，代码是

$query = mysql_query("
SELECT

t.tid as tid,
t.title as title,
t.start_date as start_date,
t.title_seo as title_seo,

p.post as post,

a.attach_location as attach_location,

FROM ".$forum_prefix."topics t
LEFT JOIN ".$forum_prefix."posts p ON p.topic_id = t.tid
LEFT JOIN ".$forum_prefix."attachments a ON a.attach_rel_id = t.tid

GROUP BY t.tid
") or die(mysql_error());

Answer 1

删除字段子句末尾的逗号。

Answer 2

$query = mysql_query("
SELECT

t.tid as tid,
t.title as title,
t.start_date as start_date,
t.title_seo as title_seo,

p.post as post,

a.attach_location as attach_location

FROM ".$forum_prefix."topics t
LEFT JOIN ".$forum_prefix."posts p ON p.topic_id = t.tid
LEFT JOIN ".$forum_prefix."attachments a ON a.attach_rel_id = t.tid

GROUP BY t.tid
") or die(mysql_error());

试试这个!!不要忘记逃避您的数据。不要使用mysql_*使用mysqli_*或PDO参考Link