Php 区分并集中的两个表

我正在尝试从这两个表中回显结果，到目前为止，这段代码运行良好，但是我需要从用户声明中获得所有结果，以红色回显丢失，以绿色回显所有用户声明？ 有没有办法区分两者。谢谢大家

$stmt = $dbh->query('SELECT * FROM `user_statements_lost` WHERE `note` = "CoinFlip" UNION ALL SELECT * FROM `user_statements_won` WHERE `note` = "CoinFlip" ORDER BY `transactionIdentifier` DESC');
$stmt->execute();

$text = "";
while($row = $stmt->fetch(PDO::FETCH_ASSOC))
{
    echo $row['transactionIdentifier'];
    echo ' - ';
    echo $row['timestamp'];
    echo '<br>';
}
return $text;

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您可以向每个查询添加一个标志，指示它属于哪个组，如下所示， 我添加了文本以区分它们，但它可以是任何0/1、真/假等：

SELECT *, "lost" as flag 
FROM `user_statements_lost` 
WHERE `note` = "CoinFlip" 
UNION ALL 
SELECT *, "won" as flag 
FROM `user_statements_won` 
WHERE `note` = "CoinFlip" 
ORDER BY `transactionIdentifier` DESC