Php 我应该运行什么查询来为SQL表中的每组值选择最高值？

我有一个

出价表

（比如eBay出价表）：

我需要选择每个

bid\u进行拍卖

仅一次，其当前最高出价，因此我的结果应如下所示：

bid_for_auction | bid_price
1               | 50
2               | 20

---

我该怎么做呢？

这应该可以做到：

SELECT
 `bid_for_auction`,
 MAX(`bid_price`)
FROM `bids`
GROUP BY `bid_for_auction`

使用

---

从竞价分组中选择竞价，最大（竞价）竞价分组竞价

为什么在

分组中添加
竞价
？
SELECT
 `bid_for_auction`,
 MAX(`bid_price`)
FROM `bids`
GROUP BY `bid_for_auction`

SELECT bid_for_auction, MAX(bid_price) AS bid_price
FROM bids GROUP BY bid_for_auction;

SELECT bid_for_auction, MAX(bid_price)
FROM bids
GROUP BY bid_for_auction