Php 从多个用户处获取每个用户的最新记录

我的受益人有多笔交易。在主页上，我想显示客户创建的最新交易。所以，最新交易的受益人应该列在金额明细的最前面。 我创建了类似这样的查询。但它没有显示最新的交易

$clause = "SELECT b.*, tran.transfer_amount, tran.date_added as tran_date_added
           FROM beneficiary b
           LEFT JOIN customer_beneficiary_mapping cbm ON b.id = cbm.ben_id
           LEFT JOIN
            (SELECT ben_id, transfer_amount, date_added
             FROM transaction
             GROUP BY ben_id
             ) tran
            ON tran.ben_id = b.id
            INNER JOIN system_country_list scl ON scl.country_id = b.ben_country
            AND cbm.cus_id = '$cus_id'
            ORDER BY tran.date_added DESC
            ";

也许这样行得通：

SELECT b.*, tran.transfer_amount, tran.date_added as tran_date_added
FROM beneficiary b
LEFT JOIN customer_beneficiary_mapping cbm ON b.id = cbm.ben_id
LEFT JOIN
    (SELECT ben_id, transfer_amount, date_added
     FROM transaction
     GROUP BY ben_id
     ) tran
ON tran.ben_id = b.id
AND tran.date_added = (SELECT MAX(date_added) FROM transaction WHERE ben_id = b.id)
INNER JOIN system_country_list scl ON scl.country_id = b.ben_country
AND cbm.cus_id = '$cus_id'
ORDER BY tran.date_added DESC

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请注意，我刚刚在where子句中添加了一个子SELECT:AND tran.date_added=SELECT MAXdate_added，这是从我找到解决方案的事务中添加的。如果有人需要，我会发布答案，而不是删除问题

$clause = "SELECT b.*, tran.transfer_amount, tran.date_added as tran_date_added
       FROM beneficiary b
       LEFT JOIN customer_beneficiary_mapping cbm ON b.id = cbm.ben_id
       LEFT JOIN
        (SELECT ben_id, transfer_amount, date_added
         FROM transaction
         GROUP BY ben_id
         ORDER BY 1 DESC        <----- Added this line
         ) tran
        ON tran.ben_id = b.id
        INNER JOIN system_country_list scl ON scl.country_id = b.ben_country
        AND cbm.cus_id = '$cus_id'
        ORDER BY tran.date_added DESC
        ";

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我还是不知道，为什么它现在起作用了。我也尝试过按日期订购，之前添加了DESC。但是，它不起作用。不管怎样，它现在正在工作

有更好的答案：-见上面的评论^^^可能重复的