mysql_query（）：无法在第127行的/home/magnet/sla/database/exportcsv.php中保存结果集

Question

尝试从我的网站运行脚本时出现错误。该脚本将从数据库导出到PDF文件。

exportcsv.php

$sql1 = "SELECT di.company,
            (SELECT corp_add from data_corp where corp_loc='$location_corp' ) as alamat ,
            (SELECT SUM(total) from data_inv where location='$location_corp' ) as total, 
            (SELECT sla from data_corp where corp_loc='$location_corp' ) as sla 
        FROM data_inv di 
            LEFT JOIN data_corp dc ON (di.company = dc.corp_name AND di.location = dc.corp_loc) 
        WHERE di.company = '$company' 
        AND di.downtime >= '$from_date' 
        AND di.uptime <= '$until_date' 
        GROUP BY dc.corp_name, dc.corp_loc";

此代码行中的以下错误

$result1 = mysql_query($sql1);    
$row = mysql_fetch_assoc($result1);

请帮助，任何回答，我都会感激 谢谢 。