如何将Mysql数据导出到Excel时join/合并两个表格下载？
我保持4张桌子。
表1（表名：产品） – > pro_id，pro_model，价格
表2（表名：pro_description） – > id，pro_id，pro_name，pro_desp
表3（表名：pro_to_category） – > id，pro_id，cat_id
表4（表名：category） – > cat_id，cat_desp
现在我想下载字段，当我导出MySQL数据到Excel下载，pro_id，pro_name，pro_desp，价格，pro_model，类别（注：类别需要cat_desp，不需要cat_id）感谢提前。 帮我解决。 🙁
<?php /*******EDIT LINES 3-8*******/ $DB_Server = "localhost"; //MySQL Server $DB_Username = "username"; //MySQL Username $DB_Password = "password"; //MySQL Password $DB_DBName = "databasename"; //MySQL Database Name $DB_TBLName = "tablename"; //MySQL Table Name $filename = "excelfilename"; //File Name /*******YOU DO NOT NEED TO EDIT ANYTHING BELOW THIS LINE*******/ //create MySQL connection $sql = "Select * from $DB_TBLName"; $Connect = @mysql_connect($DB_Server, $DB_Username, $DB_Password) or die("Couldn't connect to MySQL:<br>" . mysql_error() . "<br>" . mysql_errno()); //select database $Db = @mysql_select_db($DB_DBName, $Connect) or die("Couldn't select database:<br>" . mysql_error(). "<br>" . mysql_errno()); //execute query $result = @mysql_query($sql,$Connect) or die("Couldn't execute query:<br>" . mysql_error(). "<br>" . mysql_errno()); $file_ending = "xls"; //header info for browser header("Content-Type: application/xls"); header("Content-Disposition: attachment; filename=$filename.xls"); header("Pragma: no-cache"); header("Expires: 0"); /*******Start of Formatting for Excel*******/ //define separator (defines columns in excel & tabs in word) $sep = "\t"; //tabbed character //start of printing column names as names of MySQL fields for ($i = 0; $i < mysql_num_fields($result); $i++) { echo mysql_field_name($result,$i) . "\t"; } print("\n"); //end of printing column names //start while loop to get data while($row = mysql_fetch_row($result)) { $schema_insert = ""; for($j=0; $j<mysql_num_fields($result);$j++) { if(!isset($row[$j])) $schema_insert .= "NULL".$sep; elseif ($row[$j] != "") $schema_insert .= "$row[$j]".$sep; else $schema_insert .= "".$sep; } $schema_insert = str_replace($sep."$", "", $schema_insert); $schema_insert = preg_replace("/\r\n|\n\r|\n|\r/", " ", $schema_insert); $schema_insert .= "\t"; print(trim($schema_insert)); print "\n"; } ?> 尝试查询这些行：
SELECT t1.pro_id, t2.pro_name, t2.pro_desp, t1.price, t1.pro_model, t4.cat_desp FROM products t1 INNER JOIN pro_description t2 ON t1.pro_id = t2.pro_id INNER JOIN pro_to_category t3 ON t1.pro_id = t3.pro_id INNER JOIN category t4 ON t3.cat_id = t4.cat_id