Php/Mysql 从两个表导出数据

Question

我需要将数据从两个表 Php/Mysql 导出到 Excel 或 CSV 文件。 我尝试使用 Union All，但我在一个单元格中获取数据，我需要下一种格式：

Name:   Age (from another table)
Levan   22
Dito    35
Giorgi  46

我接下来收到：

Name:
Levan   
Dito    
Giorgi
22
35
46

<?php
    header("Content-type: text/csv; charset=UTF-8");
    header('Content-Disposition: attachment; filename=Export.csv');

    //connection
    $con = mysql_connect('localhost', 'user', 'pass');
    if(!$con) {
        echo "Error connection";
    }

    //select db
    $select_db = mysql_select_db('database', $con);
    if(!$select_db) {
        echo "Error to select database";
    }

    mysql_set_charset("utf8", $con);

    //Mysql query to get records from datanbase
    $user_query = mysql_query('SELECT Amount FROM Credit UNION ALL SELECT username FROM User');

    //While loop to fetch the records
    $contents = "Amount \t username\n";
    while($row = mysql_fetch_array($user_query)) {      
        $contents.=$row['Amount']."\t";
        $contents.=$row['username']."\n";       
    }

    $contents_final = chr(255).chr(254).mb_convert_encoding($contents, "UTF-16LE","UTF-8");
    print $contents_final;
?>

Answer 1

SELECT
Credit.Amount,
User.username
FROM
Credit
INNER JOIN Users ON Credit.username = Users.username

问题是每个表中的用户列都不同

credit->UserID
User: username

尝试这个：

SELECT
Credit.Amount,
User.username
FROM
Credit
INNER JOIN Users ON Credit.UserID = Users.username