多個INNER JOIN不能正常工作

我無法讓兩個INNER JOINS正常工作。當我僅使用第一個INNER JOIN時顯示數據，但添加第二個INNER JOIN時沒有顯示任何數據。多個INNER JOIN不能正常工作

下面是我使用其中的URL將是代碼：website.com/matchdetails/season/match_id

 <?php 
    $db = new PDO('mysql:host=db.xx.xx;dbname=xx','xx','xx'); 

    $sth = $db->prepare(" 
    SELECT * 
    FROM 
     matchdetails AS md 
    INNER JOIN 
     players AS p 
      ON 
      (p.player_id = md.player_id) 
    INNER JOIN 
     matches AS m 
      ON 
      (m.match_id = md.match_id) 
       WHERE (CONCAT_WS('/', season, match_id)) = :season"); 
    $sth->execute(array(':season' => substr($_SERVER['PATH_INFO'], 1))); 
    foreach($sth as $row) {?> 
    <?php echo 'Name '. $row['name'] . '<br/>'; ?> 
    <?php echo 'Goals ', $row['goals'] . '<br/>'; ?> 
    <?php echo 'Assists ',$row['assists'] . '<br/>'; ?> 
    <?php echo 'VVO Score ',$row['vvo_score'] . '<br/>' . '<br/>'; ?> 
    <?php }?>

我的數據庫結構爲：

表匹配

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