我有一个与 php 和内部加入一起使用的选择查询，但浏览器显示错误：
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，以在第 1 行的“SELECT specialization_name FROM user u INNER JOIN spe”附近使用正确的语法
谁能帮我 ？
这是查询：
if(isset($_POST['listbyq']))
{
if($_POST['listbyq']=="newest_members")
{
$querySrting="WHERE registered_date!='' ORDER BY registered_date DESC " or die(mysql_error());
$queryMSG="Showing senior to oldest memebrs";
}
elseif($_POST['listbyq']=="by_specialization")
{
$querySrting="SELECT specialization_name FROM user u INNER JOIN specialization s ON u.specialization=s.specialization_id WHERE u.user_id='$id'";
$result = mysql_query($queryString) or die(mysql_error());
$queryMSG="showing members with specs";
}
elseif($_POST['listbyq']=="by_firstname")
{
$fname = $_POST['fname'];
$fname = stripcslashes($fname);
$fname = strip_tags($fname);
$querySrting="WHERE first_name LIKE '%$fname%'"or die(mysql_error());
$queryMSG="Showing member with the name you searched for";
}
}
///******query the member data using the queryString*******//
$sql = mysql_query("SELECT user_id, first_name, last_name, birth_date, registered_date FROM user $querySrting") or die(mysql_error());
//**********************outputlist*********************************//
$outputlist="";
while($row = mysql_fetch_array($sql))
{
$id=$row['user_id'];
$firstname=$row['first_name'];
$lastname=$row['last_name'];
$birthdate=$row['birth_date'];
$spec = $row['specialization'];
$registereddate=$row['registered_date'];
////***********for the upload image*************************//
$check_pic="members/$id/image01.jpg";
$default_pic="members/0/image01.jpg";
if(file_exists($check_pic))
{
$user_pic="<img src=\"$check_pic\"width=\"120px\"/>";
}
else
{
$user_pic="<img src=\"$default_pic\"width=\"120px\"/>";
}
$outputlist.='
<table width="100%">
<tr>
<td width="23%" rowspan="3"><div style="height:120px;overflow:hidden;"><a href = "http://localhost/newadamKhoury/profile.php?user_id='.$id.'" target="_blank">'.$user_pic.'</a></div></td>
<td width="14%"><div align="right">Name:</div></td>
<td width="63%"><a href = "http://localhost/newadamKhoury/profile.php?user_id='.$id.'" target="_blank">'.$firstname.' '.$lastname.'</a></td>
</tr>
<tr>
<td><div align="right">Birth date:</div></td>
<td>'.$birthdate.'</td>
</tr>
<tr>
<td><div align="right">Registered:</div></td>
<td>'.$registereddate.'</td>
</tr>
</table>
<hr />
';
}//close while
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta name="keywords" content="" />
<meta name="description" content="" />
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>Search_Members</title>
<link href='http://fonts.googleapis.com/css?family=Oswald:400,300' rel='stylesheet' type='text/css' />
<link href='http://fonts.googleapis.com/css?family=Abel|Satisfy' rel='stylesheet' type='text/css' />
<link href="default.css" rel="stylesheet" type="text/css" media="all" />
<!--[if IE 6]>
<link href="default_ie6.css" rel="stylesheet" type="text/css" />
<![endif]-->
</head>
<body>
<?php require_once('header.php'); ?>
<div id="wrapper">
<div id="page-wrapper">
<div id="page">
<div id="wide-content">
<table width="94%" height="63">
<tr>
<td width="29%"><form id="form1" method="post" action="member_search.php">
Browse Newest Members
<input type="submit" name="button" id="button" value="go" />
<input type="hidden" name="listbyq" value="newest_members" />
</form></td>
<td width="28%"><form id="form2" name="form2" method="post" action="member_search.php">
Search By specialization<br />
<select name="specialization" class="formField">
<option value="0">-- Select Your Specialization --</option>
<?php specializationQuery(); ?>
</select>
<input type="submit" name="button2" id="button2" value="go" />
<input type="hidden" name="listbyq" value="by_specialization" />
</form></td>
<td width="43%"><form id="form3" name="form3" method="post" action="member_search.php">
Search By firstname
<label>
<input type="text" name = "fname" id="fname" />
</label>
<input type="submit" name="button3" id="button3" value="go" />
<input type="hidden" name="listbyq" value="by_firstname" />
</form></td>
</tr>
</table>
<br />
<table width="70%" align="center">
<tr>
<td><?php print "$queryMSG"; ?>
<br />
<?php print "$outputlist"; ?>
</td>
</tr>
</table>