PHP的MySQL添加*到SELECT语句

我怎样才能让这样的事情（添加一些SELECT命令）：PHP的MySQL添加*到SELECT语句

$query = "SELECT a.name,a.surname,b.email,c.phone 
      FROM users as a 
      inner join users_email as b 
      inner join users_phone as c 
      WHERE a.id=b.id AND a.id=c.id"; 

$query .= "ORDER BY a.surname"; 

$result = mysql_query($query,$con);

结果应该是：

$query = "SELECT a.name,a.surname,b.email,c.phone 
      FROM users as a 
      inner join users_email as b 
      inner join users_phone as c 
      WHERE a.id=b.id AND a.id=c.id 
      ORDER BY a.name"; 

$result = mysql_query($query,$con); 
$row=mysql_num_fields($result)

...但它给出了一个错误：mysql_num_fields（）预计参数1是资源，在布尔C中给出：\ XAMPP便携\ htdocs中\分贝\ file.php在线路32 ...

来源

2013-03-07 wwwglro

当你在你的代码中使用mysql_query时，为什么会说'mysql_num_fields（）'？ – 2013-03-07 13:14:13

你不应该再使用mysql，试试PDO或Mysqli – 2013-03-07 13:26:59

我的错误...我编辑过。 – wwwglro 2013-03-07 13:34:01

要给出space当你concate查询。

$query = "SELECT a.name,a.surname,b.email,c.phone 
      FROM users as a 
      inner join users_email as b 
      inner join users_telefon as c 
      WHERE a.id=b.id AND a.id=c.id "; 

$query .= " ORDER BY a.prenume"; 
      ^

也有一个练习mysql_error()。

$result = mysql_query($query,$con) or die(mysql_error());

注：Please, don't use mysql_* functions in new code。他们不再维护and are officially deprecated。请参阅red box？请改为了解prepared statements，并使用PDO或MySQLi - this article将帮助您决定哪个。如果您选择PDO，here is a good tutorial。空间后

WHERE a.id=b.id AND a.id=c.id";

所以

来源

2013-03-07 13:12:04 Rikesh

好赶Rikesh。 :) – 2013-03-07 13:15:59

就是这样......谢谢。 – wwwglro 2013-03-07 13:50:55

如果我想要做更多动态的事情，比如：'$ query。=“ORDER BY”。 $ _GET ['orderby']。 ;'??? – wwwglro 2013-03-07 13:58:06

它应和

$query .= " ORDER BY a.prenume order(asc/desc)";

的

$query .= "ORDER BY a.prenume";

insetad，你需要之前，为了给空间BY

来源

2013-03-07 13:11:32 Gautam3164

这没有任何意义，mysql默认为ASC。此外，这个错误对应于其他的东西（mysql_num_fields） – 2013-03-07 13:12:34

而且我写它给空间也....？ – Gautam3164 2013-03-07 13:17:07

添加它应该是：

WHERE a.id=b.id AND a.id=c.id ";

来源

2013-03-07 13:12:27 Aleks

试试这个：

$query = "SELECT a.name,a.surname,b.email,c.phone 
      FROM users as a 
      inner join users_email as b 
      inner join users_telefon as c 
      WHERE a.id=b.id AND a.id=c.id"; 

$query .= " ORDER BY a.prenume"; 

$result = mysql_query($query,$con);

一个 '空间' 是单前，需要通过

来源

2013-03-07 13:12:42

$query = "SELECT a.name,a.surname,b.email,c.phone 
      FROM users as a 
      inner join users_email as b ON a.id=b.id 
      inner join users_telefon as c ON a.id=c.id 
      ORDER BY a.name";

来源

2013-03-07 13:15:44 gabrielbuzzi

PHP的MySQL添加*到SELECT语句

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