Php SQL：您的SQL语法有错误；检查与您的MySQL服务器版本对应的手册，以了解要使用的正确语法 错误代码

您的SQL语法有错误；检查与您的MySQL服务器版本对应的手册，以了解在“@LNG_ID:=16”附近使用的正确语法；如果第3、4行的ART_LOOKUP.ARL_KIND为BRANDS，则选择DISTINCT。第2行的BRA_B'

这是我的PHP代码和我的查询

        <?php
if (!ini_get('display_errors')) {
    ini_set('display_errors', '1');
}
//header("Content-type: text/html; charset=windows-1251");
$securecheck = 'live_search';
$search = $_GET['search'];
$search = str_replace(' ', '%', $search);
//$search = "%" . $search . "%";
   if($search == ''){
      die("empty query");
   }

$query = mysql_query("SET @NUMBER := '" . $search . "';
@LNG_ID := 16;

SELECT DISTINCT
    IF (ART_LOOKUP.ARL_KIND IN (3, 4), BRANDS.BRA_BRAND, SUPPLIERS.SUP_BRAND) AS BRAND,
    ART_LOOKUP.ARL_SEARCH_NUMBER AS NUMBER,
    ART_LOOKUP.ARL_KIND,
    ART_LOOKUP.ARL_ART_ID,
    DES_TEXTS.TEX_TEXT AS ART_COMPLETE_DES_TEXT
FROM
               ART_LOOKUP
     LEFT JOIN BRANDS ON BRANDS.BRA_ID = ART_LOOKUP.ARL_BRA_ID
    INNER JOIN ARTICLES ON ARTICLES.ART_ID = ART_LOOKUP.ARL_ART_ID
    INNER JOIN SUPPLIERS ON SUPPLIERS.SUP_ID = ARTICLES.ART_SUP_ID
    INNER JOIN DESIGNATIONS ON DESIGNATIONS.DES_ID = ARTICLES.ART_COMPLETE_DES_ID
    INNER JOIN DES_TEXTS ON DES_TEXTS.TEX_ID = DESIGNATIONS.DES_TEX_ID
WHERE
    ART_LOOKUP.ARL_SEARCH_NUMBER = @NUMBER AND
    ART_LOOKUP.ARL_KIND IN (1, 2, 3, 4) AND
    DESIGNATIONS.DES_LNG_ID = @LNG_ID
GROUP BY
    BRAND,
    NUMBER
;
") or die (mysql_error());
echo $query;
$count = mysql_num_rows($query);
echo $count;
if($count > 0){
   $sql = mysql_fetch_array($query);
   do{
     echo "<div>" . $sql['ART_COMPLETE_DES_TEXT'] . "</div>";
   }while($sql = mysql_fetch_array($query));
}else{
   echo "no results";
}
?>

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不能使用“过时”命令运行多个查询

你需要使用MySQLi来实现这一点。

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实际上，您不需要执行多个查询。您可以删除以下行：

SET @NUMBER := '" . $search . "';
@LNG_ID := 16;

并用相应的PHP值替换所有@NUMBER和@LNG_ID，例如：

ART_LOOKUP.ARL_SEARCH_NUMBER = @NUMBER AND

会是

ART_LOOKUP.ARL_SEARCH_NUMBER = '".$search."' AND

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无法在mysql\u查询的一次调用中执行两条语句。使用请确保在将$\u GET['search']插入DB查询之前将其转义。阅读SQL injection.DISTINCT和GROUP BY以及no aggregating-hat tricki知道SQL injection，它在前端脚本中已修复。@你想说什么？^-<…我的贡献已被记录。